Microsoft says I have to re-purchase Office 2019 Home and Student, after my new Mac was repaired.
Yes, I have posted my problem with Microsoft. No replies. That's OK, the people here are much smarter anyway.
Apple replaced the motherboard on my 2 month old Mac Mini. Microsoft says I have to re-purchase Office 2019 Home and Student.
I logged into my Microsoft account and found my order for Office 2019 Home and Student. I attempted to do a re-installation on the SAME Mac Mini (with the new motherboard). Microsoft says that that serial number is already being used.
Interestingly, the computer serial number has not changed. I've been successfully reinstalling other software with no fuss. It would be a shame to have to re-purchase software that I purchased only two months ago.
Suggestions welcome.