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Asked: 2026-05-20T03:16:32+00:00

I’m trying to connect to SQL Server using Windows authentication. The code works fine

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I’m trying to connect to SQL Server using Windows authentication. The code works fine when I run it as a plain executable but when I put it in a Windows service I get the error: Login failed for user ‘NT AUTHORITY\ANONYMOUS LOGON’

I tried passing the username and password via the connection string but that doesn’t help.

Any ideas?

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1 Answer

  1. Editorial Team

    If you’re running as a servie, you’ll need to change the logon identity for the Windows Service.

    1. Start > Run > Services.msc
    2. Right-click on the service in “Services”
    3. Choose the “Log On” tab
    4. Enter the account name and password for the domain user into the “This account”, “Password” and “Confirm password” boxes
    5. Click “OK”
    6. Restart the service

    When configuring a process to connect to Sql Server via Integrated Authentication you don’t/can’t specify the username/password combination in the connection string.

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