Outlook always prompts for credentials after moving my mailbox to new exchange 2016

omer ahamed 21 Reputation points

I have exchange 2010 and I install a new exchange 2016 for migration
but before migration , I move one user to the new mailbox on the exchange 2016 and it keep asking for credentials user name and password every minute on Outlook
and i can send and receive from exch 2016
Please advise how to stop it from asking me for my cerdentials?

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Amit Singh 4,861 Reputation points

    If you make users change passwords every so often, try looking in Control Panel > Credential Manager. You can find this on your network, where ticking the remember me option has left old entries in Credential Manager, causing Outlook to confuse itself and use the old password.

    2 people found this answer helpful.
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  2. Andy David - MVP 143.8K Reputation points MVP

    You need to recycle the 2016 autodisover app pool after moving the mailboxes


    To resolve this issue, restart the Autodiscover Application Pool on the Exchange Server 2013 or Exchange Server 2016 servers.

    Restart-WebAppPool MSExchangeAutodiscoverAppPool

  3. Jade Liang-MSFT 9,961 Reputation points Microsoft Employee

    Hi @omer ahamed ,

    Was your prompt like below? It's recommended to first check the "remeber my credential " option to test if the issue has any difference.

    If the issue still exists, considering incorrect/ corrupted local credential may cause it, please try to remove the local credential to check(control panel>credential manager>windows credential>choose the credential related to your account>remove)

    If that's invalid, in order to further confirm if the issue is related to client or your mailbox itself, it's recommended to create a new Outlook profile and readd your account to check(Control Panel>Mail>Show profiles>Add>readd your account).

    If your issue has any update, please feel free to post back.