New version of Outlook can no longer add IMAP accounts where the IMAP login name is anything other than the email addres

[mike@mc]

I recently upgraded to the latest version of Outlook for Windows (the about dialog gives this version info: Microsoft Outlook Version 1.2023.1004.400). The MS documentation refers to this as "New Outlook" or "New Outlook for Windows".

When trying to add my MailEnable accounts as IMAP accounts, it fails because Outlook assumes that the IMAP login name is the full email address. While it allows me to specify a login name for SMTP, it does not allow me to specify a login name for IMAP. Therefore it cannot complete the setup task for the mailbox.

From reading the MailEnable documentation, I cannot find a way to allow my account to be logged in with the full email address as the login name. For example, I currently login using "mike@postofficename", but for the new Outlook to work I have to be able to login as "mike@domainname.com".

In prior versions of Outlook there was a way to go into advanced settings and specify a different login name than the email address. That is no longer possible --- the new version of Outlook simply does not have this field. (See the attachment --- this is the "advanced setup" dialog).

So I am hoping someone can assist with instructions on how to configure MailEnable to allow the login name for a specific account to be changed to the full email address [it won't work for this to be a blanket change across the whole Post Office, because I have hundreds of applications that send email and it won't be an option to modify them all to use different login names].

Thanks in advance,
Mike

[mike@mc]

Here is the Advanced Settings dialog -- as you can see, it's possible to specify a login name for SMTP, but not a login name for IMAP.

2023-10-13 - New Outlook IMAP dialog box.png (43.67 KiB) Viewed 3023 times

[Admin]

In the Professional or Enterprise versions of MailEnable, you can handle this under the Auth Policies setting (https://www.mailenable.com/documentation/10.0/Professional/NewTopic2.html). In the admin program, expand the Servers branch, right click on the localhost icon and select Properties from the popup menu. In the window that appears, click the "Auth Policies" tab and there is a checkbox labelled "Allow valid postoffice domain aliases in usernames".

This option allows you to substitute one of the domains under the postoffice in the username for the postoffice name. So if your postoffice was just called "corporate", before you could only use mailbox@corporate. But if example.com was configured under that postoffice, enabling the checkbox also allows you to log in with mailbox@example.com.

[mike@mc]

Thanks @Admin, that worked (at least, it works in webmail, so I assume it will work for Outlook when I try it next). Many thanks!