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Cannot Activate (re-Activate) Office 365 Products After Changing Account Email Address
I have a family subscription for Office 365. I am the primary account holder and had it installed and working on my laptop. I changed my account email address and now the office products show unlic...
Not sure if this will apply in your scenario but worth a try:
https://learn.microsoft.com/en-us/office/troubleshoot/activation/reset-office-365-proplus-activation-state