Exchange Online connectivity with IMAP not working

Question

When I try to connect to my exchange online mailbox via IMAP. it said that I used the wrong credentials. I am 100% sure that I am using the right credentials because, I can log on to the webmail with those credentials.

I tried to connect with the following:

IMAP:

• Server: outlook.office365.com
• Port: 993
• Encryption Method: SSL/TLS
• username: [the same mail address I used for the webmail]
• password: [Password that matches with the above mail address]

SMTP:

• Server: smtp.office365.com
• Port: 587
• Encryption Method: STARTTLS
• username: [the same mail address I used for the webmail]
• password: [Password that matches with the above mail address]

Does anyone know how to solve this problem?

Answer 1

Hi @Steven

Below are several settings I would recommend to have a check:

1. access EAC>Recipients>Mailboxes>user mailbox>Email apps>Manage email apps settings
   Check if IMAP is enabled for this mailbox (by default it would be enabled)
   
2. access Azure portal>Azure Active Directory > Properties>Manage security defaults
   Check if security defaults is enabled
   If it is enabled, disable it and see if it can help with this issue.
   
3. If the issue persists, have you configured some Conditional Access policies?
   If any, please exclude this account from the policies.

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