Hi,
Office 365 for Mac is currently not supported in the Q&A forums, the supported products are listed over here https://learn.microsoft.com/en-us/answers/products (more to be added later on).
You can ask the experts in the dedicated Office 365 for Mac forum over here:
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_install-mso_mac
(Please don't forget to accept helpful replies as answer)
Best regards,
Leon