For AOL accounts in classic Outlook, the usual cause is not a Microsoft interface problem. AOL typically requires an app password instead of the normal AOL password.
Try this path in classic Outlook:
- Generate an AOL app password in AOL account security.
- In Outlook, go to File > Add Account.
- Enter the AOL email address.
- When Outlook asks for the password, use the AOL app password, not the regular AOL sign-in password.
If automatic setup still fails, set it up manually:
- In classic Outlook, choose File.
- Under Account Information, choose Add Account.
- Enter the AOL email address.
- Choose Advanced options > Let me set up my account manually.
- Choose POP or IMAP.
- Enter the password, then choose Connect.
- If setup fails, choose Change Account Settings and update the server information.
Supported AOL SMTP setting in the provided documentation:
- Outgoing server:
smtp.aol.com
- Port:
587
- Authentication required: On
- Encryption: None
Other checks supported by the provided guidance:
- If the AOL app password is rejected, manually entering AOL IMAP/SMTP settings can help.
- Clear old AOL credentials from Windows Credential Manager if Outlook may be reusing outdated saved credentials.
- If Outlook previously synced AOL mail but stopped syncing folders under Inbox, renaming or removing folders under Inbox in AOL webmail can mitigate that specific sync issue. Deleting old folders can cause mail loss if messages are not moved first.
If the issue is specifically that AOL mail used to sync and then stopped, AOL changed its service in 2018, and Microsoft documented that affected users should contact AOL; Microsoft also noted the issue was later marked fixed.