This error is quite common and I have received it few times while I was working on a recent consultation project. Cannot open database requested by the login. The login failed. Login failed for user ‘NT AUTHORITY\NETWORK SERVICE’. This error occurs when you have configured your application with IIS, and IIS goes to SQL Server … Continue reading SQL SERVER – FIX : ERROR : Cannot open database requested by the login. The login failed. Login failed for user ‘NT AUTHORITY\NETWORK SERVICE’.