Outlook Connectivity issue with Exchange Server 2016

BAB 31 Reputation points

Hi all,

We have Exchange Server 2016 installed in our premises , User can access mailbox through OWA, but facing issue with Outlook .

Outlook intermittently disconnected. and going to trying to connect.

Please advise.


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.
7,390 questions
0 comments No comments
{count} vote

1 answer

Sort by: Most helpful
  1. Aaron Xue-MSFT 2,586 Reputation points Microsoft Vendor

    Hi @BAB ,

    Does the Outlook client keep prompting for a password?
    If in this case, the issue may occur with Outlook bypasses local autodiscover and directly connects to Office365.

    You could follow the steps to create ExcludeExplicitO365Endpoint registry value to bypass connection to O365.
    1.Press win+r, then type regedit on the outlook client.
    Find the below path.
    HKEY_CURRENT_USER\Software \Microsoft\Office\16.0\Outlook\AutoDiscover
    If you do not have the AutoDiscover key, please create it under the HKEY_CURRENT_USER\Software \Microsoft\Office\16.0\Outlook

    2.Create a new DWORD parameter named ExcludeExplicitO365Endpoint and value 1 , then restart Outlook.
    3.Check if the issue persists.

    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.

    1 person found this answer helpful.