Good morning, @haati ...
I'm not exactly sure when your faculty member was experiencing the issues with Office 365, but I did find a similar question about O365 that might be of help to you. My friend, @rmurchshafer, took time to reply: Office 365 approved app integration not working. - Canvas Community.
Hopefully, by now, this issue has been resolved on your end. But, if not, you may need to reach out to the folks at the Canvas Help Desk to report the issue so they can get it logged in their system. How do I contact Canvas Support? - Canvas Community If you do contact the Help Desk, please let us know the outcome of that conversation by posting a message below so that we know how it was resolved for you.
I hope this will be of some help to you. Take care, and be well.
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