Hi @Nada Botros ,
When a site in IIS connects to a database, you need to make sure that the database Test is a shareable instance.(just a remind)
- Open the Test database, select security->logins, right click to New logins....
- Login name is IIS APPPOOL\application pool name, windows authentication, check public and sysadmin in server role.
- Create a new login name NT AUTHORITY\SYSTEM in the same way.
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Best regards,
Bruce Zhang