Outlook suggests email address instead of username during setup

Gerhard Seemüller 0 Reputation points
2023-04-28T09:49:54.4366667+00:00

Exchange 2019 with Outlook 2303. If you set up Outlook outside of the internal network, Outlook asks for the username and password of the user, but suggests the email address instead of the logged-in user as the username, and does not use the password of the user. If you use your username instead of the suggested email address, the setup works without any problems, but why is the wrong username suggested at all? And how can this behavior be changed?

Exchange | Exchange Server | Other
Outlook | Windows | Classic Outlook for Windows | For business
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  1. Gerhard Seemüller 0 Reputation points
    2023-05-08T11:52:25.1933333+00:00

    Here ******@contoso.com is suggested instead of ******@contoso.com.

    2023-05-08-13-46-02

    Here ******@contoso.com is suggested instead of employeenumber@cts.local.

    2023-05-08-13-46-11

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