Hi @Eduardo Luiz Nantes G. Ferreira
If you're a Microsoft Teams administrator and your users aren't able to install the Teams Meeting add-in for Outlook, schedule Outlook meetings from Teams, or schedule Teams meetings from Outlook, try the following steps to troubleshoot and resolve the issue.
Verify that the following policies are assigned to the affected users:
- A Teams Upgrade policy which enables scheduling meetings in Teams. For more information, see Set your coexistence and upgrade settings.
- A Teams Meeting policy that permits the Outlook add-in to be installed. For more information, see Meeting policy settings.
1.If you're an administrator, you can use the diagnostic tool to validate that a user has the correct policies to enable the Teams Outlook add-in.
2.If the policies are assigned correctly, but you're still unable to install the add-in, or if you're not an administrator, download and run Microsoft Support and Recovery Assistant. The Assistant is the recommended solution to perform automated troubleshooting steps and make the required fixes.
3.If you're an administrator who has multiple users affected by the issues with the Teams Meeting add-in, you can use the Enterprise version of the Assistant. The Enterprise version of the Assistant is a command-line version that can be scripted to detect and fix most of the issues automatically without requiring user interaction. For details about using the Enterprise version of the Assistant to troubleshoot issues with the Teams Meeting add-in, see Enterprise version of Microsoft Support and Recovery Assistant.
4.You can also try to fix the problem manually. Please refer to this document for details.
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