Using Outlook for Android in business environments for email and scheduling
Think I've sorted it now. Uninstalled Outlook for Android. Rebooted twice. Reinstalled Outlook - even rebooted again when installation stalled at 99%.
Set IMAP.plus.net:993 and Relay.plus.net:465 (Same ports as gmail for android.
Ports 000, 143 (for IMAP) and 25 (for SMTP) didn't work.
The proof of the pudding will be in 24 and 48 hours - if all is still working.
Installed hotmail account ok afterwards.