Forum Discussion

MatoBoost's avatar
MatoBoost
Tin Contributor
Jul 02, 2026

New Outlook: "Changing the ImapRemoteServerInfo is not allowed" after host migration

Hi everyone! I've migrated my domain/mailbox from one IMAP host to another in May. It cannot be added to New Outlook for Windows — fails instantly with INVALID_CREDENTIALS INTERACTION_REQUIRED, even...
office 365
outlook for windows
SKMgmbh's avatar
SKMgmbh
Copper Contributor
Oct 27, 2026

Hello Robert,

I found your discussion about the “Changing the ImapRemoteServerInfo is not allowed” error in the new Outlook for Windows.

I have exactly the same problem.

Affected email address: email address removed for privacy reasons

Old IMAP server: w012b4a1.kasserver.com

New IMAP server: imap.strato.de

The error shown in DevTools is:

“Changing the ImapRemoteServerInfo is not allowed. Attempted to change it from w012b4a1.kasserver.com to imap.strato.de.”

My mailbox works perfectly in Outlook Classic and STRATO Webmail. However, I cannot add it to the new Outlook.

I have already reset and completely reinstalled the new Outlook, without success. The affected account is not listed in Outlook’s account settings, so I cannot remove it myself.

Could you please ask the Outlook team to clear the old server-side IMAP configuration for this email address?

Thank you very much for your help!