Could you schedule Teams meeting normally in Outlook web client?
If there is no issue in Outlook web client, it recommends you try to follow these steps in outlook client:
- In Outlook, go to File > Options.
- In the window that appears, look for Add-ins near the bottom of the nav column, and go there.
- Check the Add-ins list for "Microsoft Teams Meeting Add-in for Microsoft Office". In our case it was under the disabled add-ins.
- Click Start... next to Manage: COM add-ins at the bottom.
- Look for the concerning add-in, and check the box on the left of its name.
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