@Pascal Hayes , From your description, it seems our issue is related with office 365. Here we suggest to go to the following location to ask question there to get help:
Meanwhile, you can also call our Phone support to get help:
https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Hope it can help.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.