I've been troubleshooting the inability to assign a certain username as the identity for our App Pool running on an IIS 7 installation. The account used has a name that is 24 characters long, and regardless of how I checked to make sure it was correct I would always get an invalid password error when I tried to set up an account. However, when I supply the Pre-Windows 2000 name of the account (essentially truncating the username down to the first 20 characters) I am able to use the account.
What am I missing to be able to make it so I can just use the full username? While this method would technically work, I'd like to resolve the issue if possible for the sake of a homogenous environment.