Comment 9 for bug 1825580

And on the one machine, the install of 18.10 had the EWS account working, then on upgrade it wouldn't connect--kept asking for the password even after entering multiple times. I deleted the account and tried to set up again, but it failed with this same error.

On all of my installs (even fresh installs) the Microsoft Exchange option on Online Accounts appears with a red icon instead of the Exchange icon.