So, I have a number of drives mapped for users through group policy to their previous domain. The credentials that they log in with are in the GPO object. This works PEFECTLY right until I add the user to the local administrators group on their local workstation. At this point, it no longer works at all. The drives are mapped, but for some reason you still have to enter in the password (Which was included in the GPO) again and again for every single drive. Some drives just don't work AT ALL! They tell me some BS that I am logged into the same resource using two different names. Nope, everyone is logging in and attaching using the same user object for these files. So I tried to just enter in the password as a temporary measure.. NOPE! That ALSO doesn't work. It still won't create the drives correctly and in order to actually enter in the data, you have to go into the credentials manager, delete every single saved password and then try to reconnect. Some shares are even worse than that. You need to not only delete the credential, but you have to disconnect the drive and THEN delete the creds. This happens at every single reboot. Of course, although it says "Drive not connected because of an extended error", there is absolutely no mention of any error in the event log anywhere. Does anyone have any idea WTF is going on here?

why are you adding the user to the local administrators...you should add them to the administrator on the network GPO. This is where your problem is. When the user logs in using the local admin account on the workstation they are no longer on the domain. which is why you can no longer access the network drives. When you set up the user account the domain needs to be the domain you set up and then you can pick from here what they are...like...power users, administrator...etc...

Hi, To add user to the domain administrators group rather than local administrators group. Local user account could not access the network drives since these group policy settings are adapt to the domain accounts.Ivan-Liu TechNet Community Support