I am unable to enable the MS Teams add-in in Outlook

Hello Heguyien pam,

Thank you for reaching out to the Microsoft community. 

Based on the information you provided, I have consulted with a senior member of my team about your situation, and I would like to share some more specific directions with you.

• Check Outlook Add-ins:
• Open Outlook and navigate to File > Options.
• Select Add-ins.
• In the "Manage" dropdown at the bottom, select COM Add-ins and click Go.
• Look for the Microsoft Teams Meeting Add-in for Microsoft Office. If it’s unchecked, please check the box next to it and click OK. Restart Outlook and see if the add-in appears.
• Check Disabled Add-ins: If you can't find the Teams add-in in the COM Add-ins:
• Change the "Manage" dropdown to Disabled Items and click Go.
• If the Microsoft Teams add-in is listed, select it and click Enable. Restart Outlook afterward.
• Update Teams and Office: Please ensure that both Microsoft Teams and Office are up to date:
• Go to File > Office Account in any Office app and check for updates. Update Teams through its settings as well.
• Repair Office:
• Go to Control Panel > Programs > Programs and Features. Locate Microsoft Office, select it, and choose the Change option to initiate a repair.

If the issue persists after trying these steps, we recommend raising a support ticket with Microsoft’s front line support team. Microsoft's back-end support team should collect some more advanced log information from Office 365 Global Admin personnel through a remote session to diagnose the current scenario. If needed, a front-line technical support engineer can also have a specific support team investigate some specific situations further. 

Due to the limited permissions and access resources of our forum moderators, we are unable to collect certain types of log information in public forums for this reason and for the privacy of our users' data. 

After diagnosing the situation, our technical support team can provide possible information from their point of view. 

If there are any known issues, the Technical Support Engineer can provide this information from their back-end resources. 

For the standard procedure information provided above, in your organization, Office 365 Global Admins may need to contact the Office 365 support team on the backend through an open service request so that they can diagnose this particular scenario with some more technical resources,  

For this standard procedure, the following is the official documentation that Global Admins refer to: Get support - Microsoft 365 admin | Microsoft Learn (Online option). 

Note: If you are an end-user person, you may need to contact the Office 365 Global Administrator in your business organization to contact a Technical Support Engineer for further processing.  

Important: If any of your organization's Office 365 Business/Business/Education subscriptions are from a federated partner or reseller and the global admin can't open a service request on their end, they may need to contact the reseller's support provider so they can help the global admin open the service request on their end. After that, the Office 365 support team will participate in the service request that was created. 

Thank you very much for your valuable time in your cooperation.

Sincerely

Feroz Mahmud | Microsoft Community Moderator