I have an Office 365 subscription for personal use with two users in it. One user is for me, let's call that account firstname.lastname@example.org. The other user is for my writing partner, let's call that account email@example.com.
We have Word documents stored in Sharepoint Online, and I cannot edit them in Word on my Mac because of a very strange problem.
Whether I log on with my firstname.lastname@example.org account on the Office portal web site and then try to "Open in Word", or if I open Word on my computer first, then log on to Word using my email@example.com account and then try to open a Word document from Sharepoint Online, I have the same problem.
The problem is, when I go to open the document by either method, I am prompted to log on to Office 365 in a little window, but the prompt is to log on as firstname.lastname@example.org, not email@example.com. If I click "use another account" and enter firstname.lastname@example.org and my password, it just prompts me again and again suggests I log on as email@example.com, even though I'm already logged on as firstname.lastname@example.org.
Things I've tried:
- Clearing everything Office, Microsoft, or Word related from the keychain, including a bunch of random entries that I was directed to by a Microsoft support document.
- Completely uninstalling all Office apps, removing all Office support files in the Library, etc. (again, as detailed by a Microsoft support document). Then making sure the keychain is clear, then rebooting and re-installing Office and logging into everything from scratch. It still remembers email@example.com.
- Checking for any stored passwords in Safari or Chrome (the only browser I use - I never store passwords in a browser so there were none).
- Making sure nothing on this computer is logged in to Office 365.
- Doing hours of web searches trying to find any documentation on this problem.
How can I remove this cached (?) account so I can use Word to open Sharepoint Online documents again?