Discussion on:

Increase the number of workstations a user can join to a domain

The accepted solution is not the best method. The orginal question asked how to perform this task for "a user" - not for all users. The solution you have accepted changes the value for all users, which is a security issue and doesn't comply with Active Directory best practices. The general idea here is that you should always go with the option that resolves the problem, while decreasing security as little as possible.