Outlook keeps asking for password

ClémentBFC21 5 Reputation points
2023-02-13T14:08:08.5533333+00:00

Hello,

We are encountering a problem with Outlook asking for password many times a day. I know there a lot of topics about this subject but I can't find a real solution.

We are using O365's Outlook with 2013 exchange server (for now.)

We have 2 cases actually:

  • Outlook pop-up asking for password again and again even if the right password is used. Outlook stays mostly connected (more or less, it depends if the user closes the window or decides to ignore it)
  • Users are disconnected form Exchange server and the password is required but nothing works.

For the second one, we have to delete things in the credential manager, create a new profil and reset Office 365 password even if our mails are on exchange.

Speaking of credential manager, we have some bafflings lines when the problem occurs:

Capture

Why do we have a MS.Outlook.15 and MicrosoftOffice16_Data:SSPI? It might be linked to our problem.

Except for the ones with dates, it's written "Modified: Today" but when I took this screenshot, we modified nothing (me or the user) and right after, the user is disconnected from exchange server....

It doesn't happen to everyone (not to me for example, it's random I guess), and our users still with Outlook 2016 are fine. It seems there is a problem with O365/Exchange server.

We are encouraging our users to use OWA and we are thinking to install back Office 2016 for our VIPs but it's not tolerable.

When we configure an account on O365's Outlook, we can choose exchange server 2013 or prior. Why is it not working then?

Any help is welcomed and I'm available to realize verification and/or tests.

Thank you.

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2 answers

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  1. Amberg Solutions 0 Reputation points
    2023-02-13T15:23:13.0366667+00:00

    I don't have a general solution to your problems, but I'll give it a shot.

    My company uses Exchange servers and all the client computers were added to the domain. When I open Outlook from my home network (or any other network that isn't the domain's) I get asked to enter credentials as well, which doesn't go away even after I entered them.

    I use O365 on an Exchange Server as well, I assume the problem lies somewhere there.

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  2. Aholic Liang-MSFT 13,741 Reputation points Microsoft Vendor
    2023-02-15T02:43:08.12+00:00

    Hi @ClémentBFC21 ,

    Outlook client keeps asking for passwords is a relatively common question with multiple possible causes.

    In my experience, for the case of connecting an on-premises mailbox, you can generally try modifying the registry of Outlook client first to see if there are any changes:

    1.Locate this location in Registry Editor：

    HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\AutoDiscover

    2.Create a DWORD (30-bit) value for ExcludeExplicitO365Endpoint and change the value to "1" to enable it.

    3.Restart the computer and log in to the Outlook client.

     （Kindly note: To avoid incorrect operation, it is recommended that you back up the registry before doing so.）

    If the above method doesn't work, please feel free to reply so we can find other solutions. Thank you for your understanding.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread

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