Troubleshoot “Your Computer Could Not Be Joined to the Domain” Error
The 'maximum number of computer accounts' error comes from ms-DS-MachineAccountQuota, the domain-wide AD attribute that limits how many machine accounts any single authenticated user can create (default: 10). This article walks the four ways to fix it: delegate Create Computer Objects on the OU (recommended), raise the global quota in ADSI Edit (with caution), use a domain admin account (lazy), or reset/delete a stale computer object that is in the way. Includes the post-change replication step and the common pitfalls (setting the quota to 0, delegating to Authenticated Users, forgetting orphan objects, wrong default OU).