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Editorial Team
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Asked: 2026-06-08T23:10:19+00:00

I’ve been given a backup of a production SQL database to begin writing an

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I’ve been given a backup of a production SQL database to begin writing an application against.
I’ve got it running as a local instance and using Windows Authentication and I can READ the information, however I cannot figure out how to get IIS to use my Windows Authentication to log into the SQL server when running a local ASP.Net website.

I don’t have the authority on the DB to add users, and I’m getting an error of System.Data.SqlClient.SqlException: Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. when I try to access a page that reads the database.

I don’t think I will be able to communicate with the DB admin for a while to get him to fix this up for me. Is there anything I can do here?

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  1. Editorial Team

    Your asp code is using the same identity that IIS runs under – the Network Service account. To get it to use your credentials, you can either hard-code them into a connection string or you can use impersonation (see this link: http://msdn.microsoft.com/en-us/library/aa292118%28VS.71%29.aspx)

    The gist of the link:
    Put this in your web.config file: <identity impersonate="true" />

    -t.

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