In Outlook, click on File > Add Account.

Enter in your full email address and click Advanced Options > ‘Let me set up my account manually’ and then Connect.

Click IMAP.

Incoming mail:
Incoming Port: 993
Encryption Method: SSL/TLS
Outgoing mail:
Outgoing Port: 465
Encryption Method: SSL/TLS
Click Next.

Password: Your email account password.

Click Connect.

Untick ‘Set up Outlook Mobile on my phone, too’ and then Done.