Hi,
I have the same issue with Outlook for Apple Mail.
It has been happening for probably 5+ years for me on and off. Usually it has resolved itself within 24 hours and after many attempts at just trying to re-sync and enter the password. Sometimes it will say "Unable to verify account name or password" but still syncs ok (probably once in every 20 attempts), not sure why, so i keep trying and hope that it eventually works.
HOWEVER, in the last 2-3 days it hasn't resolved at all and I can't access my hotmail on Apple Mail.
In case it helps your devs:
- Hotmail via IMAP currently has the issue doesn't work
- Outlook via Exchange (same email address except with @outlook.com) is working fine
To be honest, it's been on my list to migrate across to Google Mail as it's becoming very frustrating.
Jorden