If User getting in SSRS Built-In user Id parameter as system user when you add your SSRS report to ASP.net report viewer for your custom developed software but you want to see windows login user in this parameter.. for active user self reporting..

 

then go to IIS

choose your Application

Click on Authentication

Change Status As Enabled for ASP.NET Impersonation

 

Now you will see windows user in this parameter..

 

Enjoy 🙂

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