Outlook Connectivity issue with Exchange Server 2016

BAB 31 Reputation points
2022-03-14T05:21:47.307+00:00

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.

Regards

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. Aaron Xue-MSFT 2,586 Reputation points Microsoft Vendor
    2022-03-15T01:20:56.7+00:00

    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.
    183072-1.png
    3.Check if the issue persists.


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