There is no resolution. An Office 365 subscription will not activate software installed on High Sierra. If you wish to have functioning Microsoft Office products on your computer, the option remains to purchase Office 2016 for Mac from a retailer. Noting that end of support for Office 2016 was reached on October 13, 2020 so we're on our own for nutting out any technical problems that arise from continued use of that software.
I posted the following earlier today. I contacted Microsoft Support and spoke with an agent on chat who was able to cancel and refund my Office 365 subscription. Hope this helps someone else.
I too have discovered this same problem after purchasing a 365 subscription today. High Sierra 10.13.6
I had fully functional office software installed on the machine, previous subscription was through an organisation I no longer am engaged with so office files have been read-only for some months.
- I ran through Ryan.W's suggestion to remove existing licences.
- I uninstalled existing office and reinstalled from the link provided here
https://answers.microsoft.com/en-us/msoffice/forum/all/version-of-office-365-for-mac-os-101316-high/b156a0e4-99ba-4163-a50f-29078d9998c2
As described in the original question, when attempting to activate office, I am able to enter in my email address in the sign in page. Clicking Next opens the next page. This page is devoid of anything, nowhere to enter password, no feedback as to what might have gone wrong. Just a blank, white page.
If I can't get in through the front door, how can I contact the team at Office 365 to activate my software in a different way, e.g. remotely?
Amanda