Connect to the latest conferences, trainings, and blog posts for Microsoft 365, Office client, and SharePoint developers. The Microsoft Defender for Office 365 evaluation experience is designed to eliminate the complexities of device and environment configuration so that you can focus on evaluating the capabilities of Microsoft Defender for Office 365. With evaluation mode, all messages sent to Exchange Online mailboxes can be evaluated without pointing MX records.
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.
- You can create Microsoft 365 Groups from a variety of tools including Outlook, Outlook on the web, Outlook Mobile, SharePoint, Planner, Teams and more. Which tool you choose to start from depends a bit on what kind of group you're working with.
- Get Microsoft 365 You can use Outlook to read and send mail from Yahoo, Gmail, Hotmail, and other email accounts. If you want to manually add another email account to Outlook.
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.
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.
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 Meeting policy settings - General.
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 Meeting policy settings - General 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.
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.
- 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'.
Related topics
-->Important

The improved Microsoft 365 security center is now available. This new experience brings Defender for Endpoint, Defender for Office 365, Microsoft 365 Defender, and more into the Microsoft 365 security center. Learn what's new.
Applies to
Important
This article is intended for business customers who have Microsoft Defender for Office 365. If you are using Outlook.com, Microsoft 365 Family, or Microsoft 365 Personal, and you're looking for information about Safe Links or Safe Attachments in Outlook, see Advanced Outlook.com security for Microsoft 365 subscribers.
Microsoft Defender for Office 365 safeguards your organization against malicious threats posed by email messages, links (URLs), and collaboration tools. Defender for Office 365 includes:
Threat protection policies: Define threat-protection policies to set the appropriate level of protection for your organization.
Reports: View real-time reports to monitor Defender for Office 365 performance in your organization.
Threat investigation and response capabilities: Use leading-edge tools to investigate, understand, simulate, and prevent threats.
Automated investigation and response capabilities: Save time and effort investigating and mitigating threats.

Interactive guide to Microsoft Defender for Office 365
In this interactive guide you'll learn how to safeguard your organization with Microsoft Defender for Office 365. You'll see how Defender for Office 365 can help you define protection policies, analyze threats to your organization, and respond to attacks.
Getting Started
If you're new to Microsoft Defender for Office 365 or learn best by doing, you may benefit from breaking initial Defender for Office 365 configuration into chunks, investigating, and viewing reports using this article as a reference. Here are logical early configuration chunks:
- Configure everything with 'anti' in the name.
- anti-malware
- anti-phishing
- anti-spam
- Set up everything with 'safe' in the name.
- Safe Links
- Safe Attachments
- Defend the workloads (ex. SharePoint Online, OneDrive, and Teams)
- Protect with Zero-Hour auto purge
To learn by doing, click this link.
Note
Microsoft Defender for Office 365 comes in two different Plan types. You can tell if you have Plan 1 if you have 'Real-time Detections', and Plan 2, if you have Threat Explorer. The Plan you have influences the tools you will see, so be certain that you're aware of your Plan as you learn.
Microsoft Defender for Office 365 Plan 1 and Plan 2
The following table summarizes what's included in each plan.
Microsoft Defender for Office 365 Plan 1 | Microsoft Defender for Office 365 Plan 2 |
---|---|
Configuration, protection, and detection capabilities: | Microsoft Defender for Office 365 Plan 1 capabilities --- plus --- Automation, investigation, remediation, and education capabilities: |
Microsoft Defender for Office 365 Plan 2 is included in Office 365 E5, Office 365 A5, Microsoft 365 E5 Security, and Microsoft 365 E5.
Microsoft Defender for Office 365 Plan 1 is included in Microsoft 365 Business Premium.
Microsoft Defender for Office 365 Plan 1 and Microsoft Defender for Office 365 Plan 2 are each available as an add-on for certain subscriptions. To learn more, see Feature availability across Microsoft Defender for Office 365 plans.
The Safe Documents feature is only available to users with the Microsoft 365 E5 or Microsoft 365 E5 Security licenses (not included in Microsoft Defender for Office 365 plans).
If your current subscription does not include Microsoft Defender for Office 365, contact sales to start a trial, and see how Defender for Office 365 can work for your organization.
Configure Microsoft Defender for Office 365 policies
With Microsoft Defender for Office 365, your organization's security team can configure protection by defining policies in the Security & Compliance Center (Go to https://protection.office.com > Threat management > Policy.)
Learn more by watching this video.
Outlook 365 Login Portal
Tip
For a quick list of policies to define, see Protect against threats.
Defender for Office 365 Policies
The policies that are defined for your organization determine the behavior and protection level for predefined threats. Policy options are extremely flexible. For example, your organization's security team can set fine-grained threat protection at the user, organization, recipient, and domain level. It is important to review your policies regularly because new threats and challenges emerge daily.
Safe Attachments: Provides zero-day protection to safeguard your messaging system, by checking email attachments for malicious content. It routes all messages and attachments that do not have a virus/malware signature to a special environment, and then uses machine learning and analysis techniques to detect malicious intent. If no suspicious activity is found, the message is forwarded to the mailbox. To learn more, see Set up Safe Attachments policies.
Safe Links: Provides time-of-click verification of URLs, for example, in emails messages and Office files. Protection is ongoing and applies across your messaging and Office environment. Links are scanned for each click: safe links remain accessible and malicious links are dynamically blocked. To learn more, see Set up Safe Links policies.
Safe Attachments for SharePoint, OneDrive, and Microsoft Teams: Protects your organization when users collaborate and share files, by identifying and blocking malicious files in team sites and document libraries. To learn more, see Turn on Defender for Office 365 for SharePoint, OneDrive, and Microsoft Teams.
Anti-phishing protection in Defender for Office 365: Detects attempts to impersonate your users and internal or custom domains. It applies machine learning models and advanced impersonation-detection algorithms to avert phishing attacks. To learn more, see Configure anti-phishing policies in Microsoft Defender for Office 365.
View Microsoft Defender for Office 365 reports
Microsoft Defender for Office 365 includes an advanced reporting dashboard to monitor your Defender for Office 365 performance. You can access it at Reports > Dashboard in the Security & Compliance Center.
Reports update in real-time, providing you with the latest insights. These reports also provide recommendations and alert you to imminent threats. Predefined reports include the following:
... and several more.
Use threat investigation and response capabilities
Microsoft Defender for Office 365 Plan 2 includes best-of-class threat investigation and response tools that enable your organization's security team to anticipate, understand, and prevent malicious attacks.
Threat trackers provide the latest intelligence on prevailing cybersecurity issues. For example, you can view information about the latest malware, and take countermeasures before it becomes an actual threat to your organization. Available trackers include Noteworthy trackers, Trending trackers, Tracked queries, and Saved queries.
Threat Explorer (or real-time detections) (also referred to as Explorer) is a real-time report that allows you to identify and analyze recent threats. You can configure Explorer to show data for custom periods.
Attack Simulator allows you to run realistic attack scenarios in your organization to identify vulnerabilities. Simulations of current types of attacks are available, including spear phishing credential harvest and attachment attacks, and password spray and brute force password attacks.
Save time with automated investigation and response
(NEW!) When you are investigating a potential cyberattack, time is of the essence. The sooner you can identify and mitigate threats, the better off your organization will be. Automated investigation and response (AIR) capabilities include a set of security playbooks that can be launched automatically, such as when an alert is triggered, or manually, such as from a view in Explorer. AIR can save your security operations team time and effort in mitigating threats effectively and efficiently. To learn more, see AIR in Office 365.
Permissions required to use Microsoft Defender for Office 365 features
To access Microsoft Defender for Office 365 features in the Security & Compliance Center, you must be assigned an appropriate role. The following table includes some examples:
Role or role group | Resources to learn more |
---|---|
global administrator (this can be assigned in either Azure Active Directory or in the Security & Compliance Center) | About Microsoft 365 admin roles |
Security Administrator (this can be assigned in either Azure Active Directory or the Security & Compliance Center) | Administrator role permissions in Azure Active Directory |
Exchange Online Organization Management (this is assigned in Exchange Online) | Permissions in Exchange Online |
Search and Purge (this is assigned only in the Security & Compliance Center) | Permissions in the Security & Compliance Center |
For more information, see Permissions in the Security & Compliance Center.
Get Microsoft Defender for Office 365

Microsoft Defender for Office 365 is included in certain subscriptions, such as Microsoft 365 E5, Office 365 E5, Office 365 A5, and Microsoft 365 Business Premium. If your subscription does not include Defender for Office 365, you can purchase Defender for Office 365 Plan 1 or Defender for Office 365 Plan 2 as an add-on to certain subscriptions. To learn more, see the following resources:
Microsoft Defender for Office 365 availability for a list of subscriptions that include Defender for Office 365 plans.
Feature availability across Microsoft Defender for Office 365 plans for a list of features included in Plan 1 and 2.
Get the right Microsoft Defender for Office 365 to compare plans and purchase Defender for Office 365.
New features in Microsoft Defender for Office 365
Outlook 365 Panynj
New features are added to Microsoft Defender for Office 365 continually. To learn more, see the following resources:
Microsoft 365 Roadmap provides a list of new features in development and rolling out.
Microsoft Defender for Office 365 Service Description describes features and availability across Defender for Office 365 plans.
Outlook 365 Office
See also
Outlook 365 Sign In
Automated investigation and response (AIR) in Microsoft 365 Defender1
