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Today, we are announcing the general availability of Office 2019 for Windows and Mac. Office 2019 is the next on-premises version of Word, Excel, PowerPoint, Outlook, Project, Visio, Access, and Publisher.

Get more with Office 365 ProPlus

To install Office, try signing in directly to the Office 365 Software page instead. Select the language and bit-version you want (PC users can choose between 32-bit and 64-bit), and then click Install. See Steps 2 and 3 on the PC or Mac tabs above to help you with the rest of the install process. Upgrade to Office 365 and get the latest Office applications, installs on multiple PCs/Macs and devices, 1 TB OneDrive cloud storage per user, tech support, and other services with your subscription. Since Office is a premium suite of applications developed by Microsoft, Mac users often struggle to use it. A lot of times, Mac blocks the auto-update for third-party apps like MS Office, which causes this problem.

Office 365 ProPlus is the most productive and most secure Office experience for enterprises.

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Office 365 ProPlus, the cloud-connected version of Office, delivers the most productive and most secure Office experience—with the lowest total cost of ownership for deployment and management. However, for customers who aren’t ready for the cloud, Office 2019 provides new features and updates to the on-premises apps for both users and IT professionals. Like Windows Long Term Servicing Channel (LTSC) releases, Office 2019 provides a set of valuable enhancements for customers who can’t be cloud-connected or receive regular updates.

The new enhancements in Office 2019 are a subset of a long list of features that have been added to Office 365 ProPlus over the last three years. Office 2019 is a one-time release and won’t receive future feature updates. However, we’ll continue to add new features to Office 365 ProPlus monthly, including innovations in collaboration, artificial intelligence (AI), security, and more.

Office 2019 delivers features across apps to help users create amazing content in less time. In PowerPoint 2019, you can create cinematic presentations with new features like Morph and Zoom. And improved inking features across the apps in Windows—like the roaming pencil case, pressure sensitivity, and tilt effects—allow you to naturally create documents.

Excel 2019 adds powerful new data analysis features, including new formulas and charts and enhancements to PowerPivot.

Word 2019 and Outlook 2019 help you focus on what matters most. Learning Tools, like Read Aloud and Text Spacing, make it easier to engage with your content. Focus Mode blocks out distractions and puts your content front and center. And Focused Inbox moves less important emails out of the way—so you can get straight to taking care of business. For a longer list of the new features in Office 2019, see our FAQs.

Office 2019 also includes new IT value for enhanced security and streamlined administration. We introduced Click-to-Run (C2R), a modern deployment technology, in Office 2013, and it’s now used to deploy and update Office across hundreds of millions of devices worldwide. With Office 2019, we’re moving the on-premises versions of Office to C2R to reduce costs and improve security. The advantages of C2R include predictable monthly security updates, up-to-date apps on installation, reduced network consumption through Windows 10 download optimization technology, and an easy upgrade path to Office 365 ProPlus. C2R offers the same enterprise-focused management capabilities as Microsoft Installer (MSI) based products and will also support an in-place upgrade when you move to Office 2019 from older MSI-based products. To learn more, refer to the Office 2019 Click-to-Run FAQ.

The 2019 release of Office products also includes updates to our servers, and in the coming weeks, we will release Exchange Server 2019, Skype for Business Server 2019, SharePoint Server 2019, and Project Server 2019.

Office 2019 is a valuable update for customers who aren’t yet ready for the cloud. And each time we release a new on-premises version of Office, customers ask us if this will be our last. We’re pleased to confirm that we’re committed to another on-premises release in the future. While the cloud offers real benefits in productivity, security, and total cost of ownership, we recognize that each customer is at a different point in their adoption of cloud services. We see the on-premises version of Office as an important part of our commitment to give customers the flexibility they need to move to the cloud at their own pace.

Availability

  • Commercial volume-licensed (trusted) customers can access Office 2019 starting today.
  • Office 2019 is now available for consumer and commercial customers. For consumer customers in China, India, and Japan, Office 2019 suites will be available in the next few months.
  • Certain features are only available in the Mac or Windows versions of Office 2019. For details, see the FAQ.
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Understanding the add-in runtime

Office Add-ins are secured by an add-in runtime environment, a multiple-tier permissions model, and performance governors. This framework protects the user's experience in the following ways:

  • Access to the host application's UI frame is managed.

  • Only indirect access to the host application's UI thread is allowed.

  • Modal interactions aren't allowed - for example, calls to JavaScript alert, confirm, and prompt functions aren't allowed because they're modal.

Further, the runtime framework provides the following benefits to ensure that an Office Add-in can't damage the user's environment:

  • Isolates the process the add-in runs in.

  • Doesn't require .dll or .exe replacement or ActiveX components.

  • Makes add-ins easy to install and uninstall.

Also, the use of memory, CPU, and network resources by Office Add-ins is governable to ensure that good performance and reliability are maintained.

The following sections briefly describe how the runtime architecture supports running add-ins in Office clients on Windows-based devices, on OS X Mac devices, and in web browsers.

Clients on Windows and OS X devices

In supported clients for desktop and tablet devices, such as Excel on Windows, and Outlook on Windows and Mac, Office Add-ins are supported by integrating an in-process component, the Office Add-ins runtime, which manages the add-in lifecycle and enables interoperability between the add-in and the client application. The add-in webpage itself is hosted out-of-process. As shown in figure 1, on a Windows desktop or tablet device, the add-in webpage is hosted inside an Internet Explorer or Microsoft Edge control which, in turn, is hosted inside an add-in runtime process that provides security and performance isolation.

On Windows desktops, Protected Mode in Internet Explorer must be enabled for the Restricted Site Zone. This is typically enabled by default. If it is disabled, an error will occur when you try to launch an add-in.

Figure 1. Office Add-ins runtime environment in Windows-based desktop and tablet clients

As shown in the following figure, on an OS X Mac desktop, the add-in web page is hosted inside a sandboxed WebKit runtime host process which helps provide similar level of security and performance protection.

Figure 2. Office Add-ins runtime environment in OS X Mac clients

The Office Add-ins runtime manages interprocess communication, the translation of JavaScript API calls and events into native ones, as well as UI remoting support to enable the add-in to be rendered inside the document, in a task pane, or adjacent to an email message, meeting request, or appointment.

Web clients

In supported Web clients, Office Add-ins are hosted in an iframe that runs using the HTML5 sandbox attribute. ActiveX components or navigating the main page of the web client are not allowed. Office Add-ins support is enabled in the web clients by the integration of the JavaScript API for Office. In a similar way to the desktop client applications, the JavaScript API manages the add-in lifecycle and interoperability between the add-in and the web client. This interoperability is implemented by using a special cross-frame post message communication infrastructure. The same JavaScript library (Office.js) that is used on desktop clients is available to interact with the web client. The following figure shows the infrastructure that supports add-ins in Office running in the browser, and the relevant components (the web client, iframe, Office Add-ins runtime, and JavaScript API for Office) that are required to support them.

Figure 3. Infrastructure that supports Office Add-ins in Office web clients

Add-in integrity in AppSource

You can make your Office Add-ins available to the public by publishing them to AppSource. AppSource enforces the following measures to maintain the integrity of add-ins:

  • Requires the host server of an Office Add-in to always use Secure Sockets Layer (SSL) to communicate.

  • Requires a developer to provide proof of identity, a contractual agreement, and a compliant privacy policy to submit add-ins.

  • Ensures that the source of add-ins is accessible in read-only mode.

  • Supports a user-review system for available add-ins to promote a self-policing community.

Addressing end users' privacy concerns

This section describes the protection offered by the Office Add-ins platform from the customer's (end user's) perspective, and provides guidelines for how to support users' expectations and how to securely handle users' personally identifiable information (PII).

End users' perspective

Office Add-ins are built using web technologies that run in a browser control or iframe. Because of this, using add-ins is similar to browsing to web sites on the Internet or intranet. Add-ins can be external to an organization (if you acquire the add-in from AppSource) or internal (if you acquire the add-in from an Exchange Server add-in catalog, SharePoint app catalog, or file share on an organization's network). Add-ins have limited access to the network and most add-ins can read or write to the active document or mail item. The add-in platform applies certain constraints before a user or administrator installs or starts an add-in. But as with any extensibility model, users should be cautious before starting an unknown add-in.

The add-in platform addresses end users' privacy concerns in the following ways:

  • Data communicated with the web server that hosts a content, Outlook or task pane add-in as well as communication between the add-in and any web services it uses must be encrypted using the Secure Socket Layer (SSL) protocol.

  • Before a user installs an add-in from AppSource, the user can view the privacy policy and requirements of that add-in. In addition, Outlook add-ins that interact with users' mailboxes surface the specific permissions that they require; the user can review the terms of use, requested permissions and privacy policy before installing an Outlook add-in.

  • When sharing a document, users also share add-ins that have been inserted in or associated with that document. If a user opens a document that contains an add-in that the user hasn't used before, the host application prompts the user to grant permission for the add-in to run in the document. In an organizational environment, the Office host application also prompts the user if the document comes from an external source.

  • Users can enable or disable the access to AppSource. For content and task pane add-ins, users manage access to trusted add-ins and catalogs from the Trust Center on the host Office client (opened from File > Options > Trust Center > Trust Center Settings > Trusted Add-in Catalogs). For Outlook add-ins, uses can manage add-ins by choosing the Manage Add-ins button: in Outlook on Windows, choose File > Manage Add-ins. In Outlook on Mac, choose the Manage Add-ins button on the add-in bar. In Outlook on the web, choose the Settings menu (gear icon) > Manage add-ins. Administrators can also manage this access by using group policy.

  • The design of the add-in platform provides security and performance for end users in the following ways:

    • An Office Add-in runs in a web browser control that is hosted in an add-in runtime environment separate from the Office host application. This design provides both security and performance isolation from the host application.

    • Running in a web browser control allows the add-in to do almost anything a regular web page running in a browser can do but, at the same time, restricts the add-in to observe the same-origin policy for domain isolation and security zones.

Outlook add-ins provide additional security and performance features through Outlook add-in specific resource usage monitoring. For more information, see Privacy, permissions, and security for Outlook add-ins.

Developer guidelines to handle PII

The following lists some specific PII protection guidelines for you as a developer of Office Add-ins: Microsoft solitaire for mac.

  • The Settings object is intended for persisting add-in settings and state data across sessions for a content or task pane add-in, but don't store passwords and other sensitive PII in the Settings object. The data in the Settings object isn't visible to end users, but it is stored as part of the document's file format which is readily accessible. You should limit your add-in's use of PII and store any PII required by your add-in on the server hosting your add-in as a user-secured resource.

  • Using some applications can reveal PII. Make sure that you securely store data for your users' identity, location, access times, and any other credentials so that data won't become available to other users of the add-in.

  • If your add-in is available in AppSource, the AppSource requirement for HTTPS protects PII transmitted between your web server and the client computer or device. However, if you re-transmit that data to other servers, make sure you observe the same level of protection.

  • If you store users' PII, make sure you reveal that fact, and provide a way for users to inspect and delete it. If you submit your add-in to AppSource, you can outline the data you collect and how it's used in the privacy statement.

Developers' permission choices and security practices

Follow these general guidelines to support the security model of Office Add-ins, and drill down on more details for each add-in type.

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Permissions choices

The add-in platform provides a permissions model that your add-in uses to declare the level of access to a user's data that it requires for its features. Each permission level corresponds to the subset of the JavaScript API for Office your add-in is allowed to use for its features. For example, the WriteDocument permission for content and task pane add-ins allows access to the Document.setSelectedDataAsync method that lets an add-in write to the user's document, but doesn't allow access to any of the methods for reading data from the document. This permission level makes sense for add-ins that only need to write to a document, such as an add-in where the user can query for data to insert into their document.

As a best practice, you should request permissions based on the principle of least privilege. That is, you should request permission to access only the minimum subset of the API that your add-in requires to function correctly. For example, if your add-in needs only to read data in a user's document for its features, you should request no more than the ReadDocument permission. (But, keep in mind that requesting insufficient permissions will result in the add-in platform blocking your add-in's use of some APIs and will generate errors at run time.)

You specify permissions in the manifest of your add-in, as shown in the example in this section below, and end users can see the requested permission level of an add-in before they decide to install or activate the add-in for the first time. Additionally, Outlook add-ins that request the ReadWriteMailbox permission require explicit administrator privilege to install.

The following example shows how a task pane add-in specifies the ReadDocument permission in its manifest. To keep permissions as the focus, other elements in the manifest aren't displayed.

For more information about permissions for task pane and content add-ins, see Requesting permissions for API use in add-ins.

For more information about permissions for Outlook add-ins, see the following topics:

Same origin policy

Because Office Add-ins are webpages that run in a web browser control, they must follow the same-origin policy enforced by the browser: by default, a webpage in one domain can't make XmlHttpRequest web service calls to another domain other than the one where it is hosted.

One way to overcome this limitation is to use JSON/P -- provide a proxy for the web service by including a script tag with a src attribute that points to some script hosted on another domain. You can programmatically create the script tags, dynamically creating the URL to which to point the src attribute, and passing parameters to the URL via URI query parameters. Web service providers create and host JavaScript code at specific URLs, and return different scripts depending on the URI query parameters. These scripts then execute where they are inserted and work as expected.

The following is an example of JSON/P in the Outlook add-in example.

Exchange and SharePoint provide client-side proxies to enable cross-domain access. In general, same origin policy on an intranet isn't as strict as on the Internet. For more information, see Same Origin Policy Part 1: No Peeking and Addressing same-origin policy limitations in Office Add-ins.

Tips to prevent malicious cross-site scripting

An ill-intentioned user could attack the origin of an add-in by entering malicious script through the document or fields in the add-in. A developer should process user input to avoid executing a malicious user's JavaScript within their domain. The following are some good practices to follow to handle user input from a document or mail message, or via fields in an add-in:

  • Instead of the DOM property innerHTML, use the innerText and textContent properties where appropriate. Do the following for Internet Explorer and Firefox cross-browser support:

    For information about the differences between innerText and textContent, see Node.textContent. For more information about DOM compatibility across common browsers, see W3C DOM Compatibility - HTML.

  • If you must use innerHTML, make sure the user's input doesn't contain malicious content before passing it to innerHTML. For more information and an example of how to use innerHTML safely, see innerHTML property.

  • If you are using jQuery, use the .text() method instead of the .html() method.

  • Use the toStaticHTML method to remove any dynamic HTML elements and attributes in users' input before passing it to innerHTML.

  • Use the encodeURIComponent or encodeURI function to encode text that is intended to be a URL that comes from or contains user input.

  • See Developing secure add-ins for more best practices to create more secure web solutions.

Office

Tips to prevent 'Clickjacking'

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Because Office Add-ins are rendered in an iframe when running in a browser with Office host applications, use the following tips to minimize the risk of clickjacking -- a technique used by hackers to fool users into revealing confidential information.

First, identify sensitive actions that your add-in can perform. These include any actions that an unauthorized user could use with malicious intent, such as initiating a financial transaction or publishing sensitive data. For example, your add-in might let the user send a payment to a user-defined recipient.

Second, for sensitive actions, your add-in should confirm with the user before it executes the action. This confirmation should detail what effect the action will have. It should also detail how the user can prevent the action, if necessary, whether by choosing a specific button marked 'Don't Allow' or by ignoring the confirmation.

Third, to ensure that no potential attacker can hide or mask the confirmation, you should display it outside the context of the add-in (that is, not in an HTML dialog box).

Here are some examples of how you could get confirmation:

  • Send an email to the user that contains a confirmation link.

  • Send a text message to the user that includes a confirmation code that the user can enter in the add-in.

  • Open a confirmation dialog in a new browser window to a page that cannot be iframed. This is typically the pattern that is used by login pages. Use the dialog api to create a new dialog.

Also, ensure that the address you use for contacting the user couldn't have been provided by a potential attacker. For example, for payment confirmations use the address on file for the authorized user's account.

Other security practices

Developers should also take note of the following security practices:

  • Developers shouldn't use ActiveX controls in Office Add-ins as ActiveX controls don't support the cross-platform nature of the add-in platform.

  • Content and task pane add-ins assume the same SSL settings that the browser uses by default, and allows most content to be delivered only by SSL. Outlook add-ins require all content to be delivered by SSL. Developers must specify in the SourceLocation element of the add-in manifest a URL that uses HTTPS, to identify the location of the HTML file for the add-in.

    To make sure add-ins aren't delivering content by using HTTP, when testing add-ins, developers should make sure the following settings are selected in Internet Options in Control Panel and no security warnings appear in their test scenarios:

    • Make sure the security setting, Display mixed content, for the Internet zone is set to Prompt. You can do that by selecting the following in Internet Options: on the Security tab, select the Internet zone, select Custom level, scroll to look for Display mixed content, and select Prompt if it isn't already selected.

    • Make sure Warn if Changing between Secure and not secure mode is selected in the Advanced tab of the Internet Options dialog box.

  • To make sure that add-ins don't use excessive CPU core or memory resources and cause any denial of service on a client computer, the add-in platform establishes resource usage limits. As part of testing, developers should verify whether an add-in performs within the resource usage limits.

  • Before publishing an add-in, developers should make sure that any personal identifiable information that they expose in their add-in files is secure.

  • Developers shouldn't embed keys that they use to access third-party APIs or services (such as Bing, Google, or Facebook) directly in the HTML pages of their add-in. Instead, they should create a custom web service or store the keys in some other form of secure web storage that they can then call to pass the key value to their add-in.

  • Developers should do the following when submitting an add-in to AppSource:

    • Host the add-in they are submitting on a web server that supports SSL.
    • Produce a statement outlining a compliant privacy policy.
    • Be ready to sign a contractual agreement upon submitting the add-in.

Other than resource usage rules, developers for Outlook add-ins should also make sure their add-ins observe limits for specifying activation rules and using the JavaScript API. For more information, see Limits for activation and JavaScript API for Outlook add-ins.

IT administrators' control

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In a corporate setting, IT administrators have ultimate authority over enabling or disabling access to AppSource and any private catalogs.

The management and enforcement of Office settings is done with group policy settings. These are configurable through the Office Deployment Tool, in conjunction with the Office Customization Tool.

Setting nameDescription
Allow Unsecure web add-ins and CatalogsAllows users to run non-secure add-ins, which are add-ins that have webpage or catalog locations that are not SSL-secured (https://) and are not in users' Internet zones.
Block Web Add-insAllows you to prevent users from using web add-ins.
Block the Office StoreAllows you to prevent users from using or inserting web add-ins that come from the Office Store.

Important

If your working groups are using multiple releases of Office, group policy settings must be configured for each release. Please refer to the Using Group Policy to manage how users can install and use apps for Office of the Overview of apps for Office 2013 article for details on group policy settings for Office 2013.

See also