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Martin Walter
Asked: 2023-02-22 20:57:51 +0800 CST

Can't setup Exchange account in Outlook

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I'm trying to add a new account to Outlook but the wizard gives me an error:

Log onto Exchange ActiveSync Mail server (EAS): The server cannot be found. The username or password you entered isn't working.

I checked the settings and I am able to login to OWA without problems. Existing accounts are not affected and work fine in Outlook.

I can see no apparent problems in my Exchange server, but I also don't know where to look regarding this problem. I find it also curious that the error message mentions that it can't find the server as well as wrong credentials.

I already did a repair installation of Exchange CU12 last night without any effect.

I also tried the Microsoft Remote Connectivity Analyzer to test Exchange ActiveSync. The test passed, with a warning that my LE certificate may only work with a Root Certificate Update.

I had to manually provide the server name, as there seems to be some problem with autodiscover. I get a 403 when accessing https://autodiscover.:443/Autodiscover/Autodiscover.xml with the Analyzer, but it works in my browser. I would like to solve that problem as well (if it is not the root cause).

email

1 Answers

  1. Best Answer

    This problem occurs because Outlook doesn't support connections to a server that's running Exchange Server by using the EAS protocol. To resolve this problem, connect to Exchange by using the standard Exchange connection settings.

    1. Select File > Add Account.
    2. Enter your email address and click Connect.
    3. If prompted, enter your password again, then select OK > Finish to start using your email account in Outlook.

    Refer to: Outlook doesn't support connections to Exchange by using ActiveSync and error: Log onto Exchange ActiveSync mail server (EAS)

    Add an email account to Outlook

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