By default, a domain user can add 10 computers to a domain.
If you want to increase it (for everyone), it’s necessary to change the setting in ADSI edit.
Open ADSIedit and connect to the default naming context
Expand the default naming context, and right-click DC= for your domain and select Properties… Then, locate the attribute ms-DS-MachineAccountQuota
Edit the property as necessary, then click OK
- 0 = domain users cannot add computers to the domain
- Clearing the value removes any limit