We have a computer on our network with some network shares. This computer is NOT part of our domain. In order to allow certain users to access the network shares, we have been creating local accounts on the computer with the same user name and password as the active directory user and adding those (local) users to the permissions list.
For example, this computer (TestComputer) has a local user (UserA) that has been given Full Control of a shared folder (TestFolder). There is also an active directory user with the same name (TESTDOMAIN\UserA). UserA can now browse to \\TestComputer\TestFolder
and read or write to it.
What we want to do is join TestComputer to our domain and then give permissions to the active directory user (TESTDOMAIN\UserA) instead and eventually delete the local user (UserA) from TestComputer.
It looks like here shows that joining a computer to a domain doesn't mess with the local accounts. However, it didn't clarify if anything would happen if those local accounts had the same name as active directory accounts. I just need clarification that I can just simply join the computer to the domain, replace the local user permissions with the active directory user and delete (maybe disable) the local user account.
Best Answer
If the domain has group policy it could potentially change members of users in the local admin and power users group.....or even add in new users. But existing users on the local machine will remain unaffected.