Thank you for posting your question in the Microsoft Q&A forum.
Regarding that you accidentally deleted some of the Outlook files, now you don't see any of your Teams invite. To better assist you, I’d like to ask a few questions so we can understand your situation more clearly:
Can you specify which files or folders were deleted?
Do you recall whether the items were temporarily deleted (moved to Deleted Items) or permanently deleted?
For this issue you could try to go to
Check the Deleted Items Folder
Open Outlook and go to the Deleted Items folder.
If the files or folders are there, right-click and choose Restore.
If you can't find the deleted item in the 'Deleted Items' folder, you can check the 'Recoverable Items' folder:
Choose the items you want to recover and click 'Recover.'
Confirm by selecting 'OK.'
Items in the 'Deleted Items' folder are recoverable for 30 days. If the items are not there, they may have been permanently removed from the 'Deleted Items' or 'Junk Email' folder.
I'm sincerely sorry for the inconvenience that you've encountered. But I need to know more about your situation so I can help you better. I appreciate your patience and are here to help. Looking forward to your response
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