4 Outlook Plugins & Add-Ins to Improve Security. The four Microsoft Outlook plug-ins on this list will help you with your security. SpamBayes is a Bayesian anti-spam plugin for Microsoft Outlook that 'tightly integrates classification and training into the Outlook interface.' Get support for Skype for Outlook.com. Web plug-in available on Internet Explorer and Firefox browsers on PC, Mac and Surface devices. For full compatibility.
-->Outlook add-ins are integrations built by third parties into Outlook by using our web-based platform. Outlook add-ins have three key aspects:
- The same add-in and business logic works across desktop (Outlook on Windows and Mac), web (Microsoft 365 and Outlook.com), and mobile.
- Outlook add-ins consist of a manifest, which describes how the add-in integrates into Outlook (for example, a button or a task pane), and JavaScript/HTML code, which makes up the UI and business logic of the add-in.
- Outlook add-ins can be acquired from AppSource or sideloaded by end-users or administrators.
Outlook add-ins are different from COM or VSTO add-ins, which are older integrations specific to Outlook running on Windows. Unlike COM add-ins, Outlook add-ins don't have any code physically installed on the user's device or Outlook client. For an Outlook add-in, Outlook reads the manifest and hooks up the specified controls in the UI, and then loads the JavaScript and HTML. The web components all run in the context of a browser in a sandbox.
The Outlook items that support add-ins include email messages, meeting requests, responses and cancellations, and appointments. Each Outlook add-in defines the context in which it is available, including the types of items and if the user is reading or composing an item.
Note
If you plan to publish your add-in to AppSource and make it available within the Office experience, make sure that you conform to the Commercial marketplace certification policies. For example, to pass validation, your add-in must work across all platforms that support the methods that you define (for more information, see section 1120.3 and the Office Add-in application and availability page).
Extension points
Extension points are the ways that add-ins integrate with Outlook. The following are the ways this can be done:
- Add-ins can declare buttons that appear in command surfaces across messages and appointments. For more information, see Add-in commands for Outlook.An add-in with command buttons on the ribbon
- Add-ins can link off regular expression matches or detected entities in messages and appointments. For more information, see Contextual Outlook add-ins.A contextual add-in for a highlighted entity (an address)
Mailbox items available to add-ins
Outlook add-ins activate when the user is composing or reading a message or appointment, but not other item types. However, add-ins are not activated if the current message item, in a compose or read form, is one of the following:
- Protected by Information Rights Management (IRM) or encrypted in other ways for protection. A digitally signed message is an example since digital signing relies on one of these mechanisms.Important
- Add-ins activate on digitally signed messages in Outlook associated with a Microsoft 365 subscription. On Windows, this support was introduced with build 8711.1000.
- Starting with Outlook build 13229.10000 on Windows, add-ins can now activate on items protected by IRM. For more information about this feature in preview, see Add-in activation on items protected by Information Rights Management (IRM).
- A delivery report or notification that has the message class IPM.Report.*, including delivery and Non-Delivery Report (NDR) reports, and read, non-read, and delay notifications.
- A draft (does not have a sender assigned to it), or in the Outlook Drafts folder.
- A .msg or .eml file which is an attachment to another message.
- A .msg or .eml file opened from the file system.
- In a shared mailbox, in another user's mailbox, in an archive mailbox, or in a public folder.
- Using a custom form.
In general, Outlook can activate add-ins in read form for items in the Sent Items folder, with the exception of add-ins that activate based on string matches of well-known entities. For more information about the reasons behind this, see 'Support for well-known entities' in Match strings in an Outlook item as well-known entities.
Supported clients
Outlook add-ins are supported in Outlook 2013 or later on Windows, Outlook 2016 or later on Mac, Outlook on the web for Exchange 2013 on-premises and later versions, Outlook on iOS, Outlook on Android, and Outlook on the web and Outlook.com. Not all of the newest features are supported in all clients at the same time. Please refer to articles and API references for those features to see which applications they may or may not be supported in.
Get started building Outlook add-ins
To get started building Outlook add-ins, try the following.
- Quick start - Build a simple task pane.
- Tutorial - Learn how to create an add-in that inserts GitHub gists into a new message.
![Mac Mac](/uploads/1/2/6/3/126300605/815120506.png)
See also
-->The Teams Meeting add-in lets users schedule a Teams meeting from Outlook. The add-in is available for Outlook on Windows, Mac, web, and mobile.
Teams Meeting add-in in Outlook for Windows
The Teams Meeting add-in is automatically installed for users who have Microsoft Teams and either Office 2013, Office 2016, or Office 2019 installed on their Windows PC. Users will see the Teams Meeting add-in on the Outlook Calendar ribbon.
Note
- There is no direct URL that links to the Teams add-in.
- There are additional considerations if your organization runs both Teams and Skype for Business. Under some circumstances, the Teams add-in is not available in Outlook. See Upgrade from Skype for Business to Teams for details.
- User permissions to execute the Regsvr32.exe file is a minimum requirement for the Teams Meeting add-in to be installed on the computer.
- If users do not see the Teams Meeting add-in, instruct them to close Outlook and Teams, then restart the Teams client first, then sign in to Teams, and then restart the Outlook client, in that specific order.
- If you are using an Office Outlook installation from the Microsoft Store, the Teams Meeting add-in isn't supported. Users who require this add-in are advised to install Click-to-Run version of Office, as outlined in Office on Windows 10 in S mode article.
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Teams Meeting add-in in Outlook for Mac
The Teams Meeting button in Outlook for Mac will appear in the Outlook for Mac ribbon if Outlook is running production build 16.24.414.0 and later and is activated with a Microsoft 365 or Office 365 client subscription.
The meeting coordinates (the Teams join link and dial-in numbers) will be added to the meeting invite after the user clicks Send.
Teams Meeting add-in in Outlook Web App
The Teams Meetings button in Outlook Web App will appear as part of new event creation if the user is on an early version of the new Outlook on the web. See the Outlook Blog to learn about how users can try the early version of the new Outlook on the web.
The meeting coordinates (the Teams join link and dial-in numbers) will be added to the meeting invite after the user clicks Send.
Teams Meeting add-in in Outlook mobile (iOS and Android)
The Teams Meeting button shows up in latest builds of the Outlook iOS and Android app.
The meeting coordinates (the Teams join link and dial-in numbers) will be added to the meeting invite after the user clicks Send.
Teams Meeting add-in and FindTime for Outlook
FindTime is an add-in for Outlook that helps users reach consensus on a meeting time across companies. Once the meeting invitees have provided their preferred times, FindTime sends out the meeting invite on the user's behalf. If the Online meeting option is selected in FindTime, FindTime will schedule a Skype for Business or Microsoft Teams meeting. (FindTime will use whichever has been set by your organization as the default online meeting channel.)
Note
If you saved a Skype for Business setting in your Findtime dashboard, FindTime will use that instead of Microsoft Teams. If you want to use Microsoft Teams, delete the Skype for Business setting in your dashboard.
For more information, see Schedule meetings with FindTime.
Authentication requirements
The Teams Meeting add-in requires users to sign in to Teams using Modern Authentication. If users do not use this method to sign in, they'll still be able to use the Teams client, but will be unable to schedule Teams online meetings using the Outlook add-in. You can fix this by doing one of the following:
- If Modern Authentication is not configured for your organization, you should configure Modern Authentication.
- If Modern Authentication is configured, but they canceled out on the dialog box, you should instruct users to sign in again using multi-factor authentication.
To learn more about how to configure authentication, see Identity models and authentication in Microsoft Teams.
Enable private meetings
Allow scheduling for private meetings must be enabled in the Microsoft Teams admin center for the add-in to get deployed. In the admin center, go to Meetings > Meeting Policies, and in the General section, toggle Allow scheduling private meetings to On.)
The Teams client installs the correct add-in by determining if users need the 32-bit or 64-bit version.
Note
Users might need to restart Outlook after an installation or upgrade of Teams to get the latest add-in.
Teams upgrade policy and the Teams Meeting add-in for Outlook
Customers can choose their upgrade journey from Skype for Business to Teams. Tenant admins can use the Teams co-existence mode to define this journey for their users. Tenant admins have the option to enable users to use Teams alongside Skype for Business (Islands mode).
When users who are in Island mode schedule a meeting in Outlook, they typically expect to be able to choose whether to schedule a Skype for Business or a Teams meeting. In Outlook on the web, Outlook Windows, and Outlook Mac, users see both Skype for Business and Teams add-ins when in Islands mode by default. You can configure a Teams meeting policy setting to control whether users in Islands mode can only use the Teams Meeting add-in or both the Teams Meeting and Skype for Business Meeting add-ins.
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Due to certain limitations in the initial release, Outlook mobile can only support creating Skype for Business or Teams meetings. See the following table for details.
Coexistence mode in the Teams admin center | Default meetings provider in Outlook mobile |
---|---|
Islands | Skype for Business |
Skype for Business only | Skype for Business |
Skype for Business with Teams collaboration | Skype for Business |
Skype for Business with Teams collaboration and meetings | Teams |
Teams only | Teams |
Set whether users in Islands mode can only use the Teams Meeting add-in or both the Teams Meeting and Skype for Business Meeting add-ins
As an admin, you can configure a Teams meeting policy setting to control which Outlook meeting add-in is used for users who are in Islands mode. You can specify whether users can only use the Teams Meeting add-in or both the Teams Meeting and Skype for Business Meeting add-ins to schedule meetings in Outlook.
You can only apply this policy to users who are in Islands mode and have the AllowOutlookAddIn parameter set to True in their Teams meeting policy. For steps on how to set this policy, see set the meeting provider for users in Islands mode.
Other considerations
The Teams Meeting add-in is still building functionality, so be aware of the following:
- The Teams Meeting add-in requires an Exchange mailbox for the primary user scheduling the meeting. Ensure that you have at least one Exchange mailbox configured in your Outlook profile and use it to schedule Teams meetings with the add-in. For Exchange requirements, see How Exchange and Teams interact.
- The add-in is for scheduled meetings with specific participants, not for meetings in a channel. Channel meetings must be scheduled from within Teams.
- The add-in will not work if an Authentication Proxy is in the network path of the user's PC and Teams Services.
- Users can't schedule live events from within Outlook. Go to Teams to schedule live events. For more information, see What are Microsoft Teams live events?.
Learn more about meetings and calling in Microsoft Teams.
Troubleshooting
Use the following steps to troubleshoot issues with the Teams Meeting add-in.
Teams Meeting add-in in Outlook for Windows does not show
If you cannot get the Teams Meeting add-in for Outlook to install, try these troubleshooting steps.
Download and run the Microsoft Support Recovery Assistant to perform automated troubleshooting steps and fixes.
Alternatively, perform the following steps manually:
- Windows 7 users must install the Update for Universal C Runtime in Windows for the Teams Meeting add-in to work.
- Check that the user has a Teams Upgrade policy which enables scheduling meetings in Teams. See Upgrade from Skype for Business to Teams for more details.
- Check that the user has a Teams Meeting policy that permits the Outlook Add-in. See Manage meeting policies in Teams for more details.
- Ensure the user has the Teams desktop client installed. The meeting add-in will not be installed when only using the Teams web client.
- Ensure the user has Outlook 2013 or later installed.
- Make sure the user has permission to execute regsvr32.exe.
- Ensure that all available updates for Outlook desktop client have been applied.
- Follow these steps:
- Restart the Teams desktop client.
- Sign out and then sign back in to the Teams desktop client.
- Restart the Outlook desktop client. (Make sure Outlook isn't running in admin mode.)
If you still don't see the add-in, make sure that it isn't disabled in Outlook.
- In Outlook, choose File and then Options.
- Select the Add-ins tab of Outlook Options dialog box.
- Confirm that Microsoft Teams Meeting Add-in for Microsoft Office is listed in the Active Application Add-ins list
- If the Teams Meeting Add-in is listed in the Disabled Application Add-ins list, select COM Add-ins in Manage and then select Go…
- Set the checkbox next to Microsoft Teams Meeting Add-in for Microsoft Office.
- Choose OK on all dialog boxes and restart Outlook.
For general guidance about how to manage add-ins, see View, manage, and install add-ins in Office programs.
If the add-in still does not show, use the following steps to verify the registry settings.
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Note
Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.
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- Launch RegEdit.exe
- Navigate to HKEY_CURRENT_USERSoftwareMicrosoftOfficeOutlookAddins
- Verify TeamsAddin.FastConnect exists.
- Within TeamsAddin.FastConnect, verify LoadBehavior exists and is set to 3.
- If LoadBehavior has a value other than 3, change it to 3 and restart Outlook.
Delegate scheduling does not work
If your administrator has configured Microsoft Exchange to control access to Exchange Web Server (EWS), a delegate won't be able to schedule a Teams meeting on behalf of the boss. The solution for this configuration is under development and will be released in the future. As a workaround, your administrator can add the following string to the EWS Allow List: 'SchedulingService'.