The article provides instructions to set up mail clients and mobile devices for Office 365 accounts.

Important: do not use automatic setup before cutover. If you are unsure on which Onboarding step you are, contact the Onboarding team.

Automatic setup

  1. Create a CNAME Autodiscover record for your domain to point to Office 365 servers:

    autodiscover.yourdomain.com CNAME autodiscover.outlook.com

  2. Refer to the following Office Support articles for instructions:

Manual setup

MAPI, EWS and ActiveSync

If automatic setup isn't working for you, mail clients can be set up manually. Follow the instructions for automatic setup but, since the server name won't be detected automatically, use the following one for:

POP/IMAP

Most POP/IMAP clients:

Protocol IMAP POP SMTP
Server name outlook.office365.com outlook.office365.com smtp.office365.com
Port 993 995 587
Encryption TLS TLS TLS

Thunderbird:

Protocol IMAP POP SMTP
Server name imap-mail.outlook.com imap-mail.outlook.com smtp-mail.outlook.com
Port 993 995 587
Encryption SSL/TLS SSL/TLS StartTLS