Using Outlook for Android in business environments for email and scheduling
I spent hours and hours and hours trying to solve this problem and had almost given up when I stumbled upon the solution. I followed the steps previously posted by another subscriber as follows:
Steps:
open android settings
go-> Accounts and backup
go-> Manage accounts
Sign out of Samsung account (with same email)
Sign out of any other microsoft account
Also follow steps to remove cache and data from outlook, uninstall
At this point rather than reinstalling outlook which had not worked the first time I followed these steps, I installed Gmail as my primary email app and linked my Microsoft email addresses. This worked without a problem an I felt like I would probably have to go forward using Gmail as my mail app. Then on a whim I reloaded the outlook app and tried to load my Microsoft emails and it worked without an issue. I was able to uninstall the Gmail and continue forward using my outlook without a problem. Whether this was a fluke on my S25 or is a true workaround solution I don't know.