I migrated my domain from imap accounts hosted at justhost to exchange online on Sunday 7 April. Some messages are still being received into the imap accounts. I suspect a schoolboy error on my part somewhere.
My MX records are as follows:-
Priority Host Points to TTL
0 @ <mydomain>-je.mail.protection.outlook.com 14400
0 @ <mydomain>.je 14400
0 @ ms93671057.msv1.invalid.outlook.com 14400
Suggestions are appreciated.