Calendar not working in the new Outlook for Teams meetings. It does work in the Classic Outlook.

Yeah, I like the new version of Outlook, but when someone sends me a Teams invite (in New Outlook) I am unable to "accept" the meeting. I do have a personal O365 account. Do I have to have a business to purchase a O365 business account, so my Outlook and Teams work correctly in the new software?

Hello Paul Collingwood

Welcome to the Microsoft Q&A forum. I understand how confusing it can be when a feature that works seamlessly in Classic Outlook is no longer available in the New Outlook, especially when you’re using a paid Microsoft 365 Personal or Family subscription.

In New Outlook for Windows, the ability to create a Microsoft Teams meeting directly from the calendar is only supported for Microsoft 365 Business, Enterprise, and Education (work or school) accounts. Personal subscriptions (Microsoft 365 Personal/Family, Outlook.com, Hotmail, or other IMAP accounts) aren’t supported for this built‑in Teams integration at this time.

This differs from Classic Outlook, which uses a local Teams add‑in that works independently of these newer server‑side restrictions.

Until support is expanded for personal accounts, you can use one of the options below:

• Schedule the meeting in the Teams app (recommended) Create the meeting directly in the Microsoft Teams (free) app. The meeting will automatically appear on your New Outlook calendar.
• Use the Skype meeting option in New Outlook For personal accounts, New Outlook currently defaults to Skype for online meetings, which remains fully supported.
• Switch back to Classic Outlook If your workflow depends on the integrated Teams button, turning off the New Outlook toggle will restore the Classic experience where this feature is still available.

I hope this helps clarify the limitation and gives you a workable path forward.

Calendar issues for Teams meetings in new Outlook can be caused by differences between new Outlook and classic Outlook, or by configuration problems with the online meeting provider.

Based on similar issues, the following checks and actions are relevant:

1. Verify that Teams is configured as the default online meeting provider for the mailbox. In environments where the Teams toggle is missing or Teams meetings do not behave correctly, the mailbox calendar configuration value DefaultOnlineMeetingProvider can be misconfigured or set to Unknown. Admins can fix this by running (in Exchange Online PowerShell):

      Set-MailboxCalendarConfiguration -Identity <user> -DefaultOnlineMeetingProvider TeamsForBusiness
   

   After this change, restart new Outlook and test creating a Teams meeting again.
2. If Teams meetings work correctly in classic Outlook but not in new Outlook, use classic Outlook as a workaround while configuration is corrected, as other users have done when new Outlook calendar behavior was unreliable.
3. If the problem is specifically with the Teams Meeting add-in in classic Outlook (for example, when switching back), use the classic Teams add-in for classic Outlook troubleshooter to repair the add-in. Run the troubleshooter from Windows 10 or later on the same PC where classic Outlook is installed and follow the Get Help steps.
4. If calendar behavior in general appears broken (for example, meetings not updating or unexpected behavior), run the Classic Outlook Calendar Check troubleshooter (CalCheck) against the mailbox using classic Outlook to detect and remediate calendar issues on the server side. After fixing any reported issues, test again in new Outlook.

If the issue persists after confirming DefaultOnlineMeetingProvider and calendar health, continue using classic Outlook as a temporary workaround and contact Microsoft Support with details that it only affects new Outlook for a personal subscription.

References:

• Troubleshoot the Teams Meeting add-in in Outlook for Windows
• Information about the Calendar Checking Tool for Outlook (CalCheck)
• Fixes or workarounds for recent issues in classic Outlook for Windows
• Teams Meeting toggle on new Outlook and Teams upon creating event not available - Microsoft Q&A
• meeting changes in new outlook do not reflect - Microsoft Q&A