Hi @Mike Kruzel
Welcome to our forum!
For better research, please provide more details about this case:
What is this user's account type?
Can't this user schedule a Teams meeting from Outlook?
There are several possible reasons why the Teams plugin for Outlook 2019 might be missing, such as policy settings, app updates, or data corruption.
Please try following the troubleshooting steps in this document to fix the problem:
Resolve issues with Teams Meeting add-in for Outlook - Microsoft Teams | Microsoft Learn.
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