19 solutions found
0X00002153 Active Directory won't start after a failed restore or boot into DS Repair Mode. Usually a database corruption or missing system state files....
0X000020ED This error hits when AD can't allocate memory for the hierarchy table during a domain controller promotion or replication. It's almost always a memory...
0X00002173 Your domain controller can't replicate because the forest schema is too high. This fix gets you back online fast....
0X000020A9 This error means Active Directory already has a dead or alive object with the same name. Here's how to find and remove it fast....
0X000020A2 Active Directory can't apply permissions because the security descriptor is corrupt. Fix by resetting the SD using ADSI Edit or repadmin....
0X0000206E This error pops up when you try to add a domain controller replica but AD says 'not now'. Usually a replication or schema issue. Here's the fix....
0X00002176 This error pops up when a domain controller can't replicate because the domain or forest functional level is too low. Here's the real fix—no fluff....
0X0000218D This error means AD couldn't derive a service principal name because a required server object reference is missing. Common fix: restore the deleted se...
0XC00002A8 Your domain controller ran out of relative identifiers (RIDs) for new security principals. You'll need to reset the RID pool or promote a new DC....
0X000020EF Active Directory replication fails with a generic unknown error due to lingering objects. Removing the offending DC from replication fixes it....
0X0000216F This error hits when a pre-SP4 NT4 domain controller tries to replicate to a Windows 2000+ DC. The fix is to upgrade or block the old DC....
0X000020E4 AD can't find a naming context (NC) it expects. Usually a replication issue after a failed domain controller demotion or DNS misconfig....
0X000020CD This error means a domain controller is stuck mid-delete of an entire NTDS tree. Usually happens during demotion or failed replication. Here's how to ...
0X0000212E Active Directory domain controller promotion failing? This error means a naming context is missing its parent. Here's the real fix....
0X00002106 This error kills AD replication between domain controllers. I'll walk you through the real fixes—from a quick service restart to schema surgery....
0X000020FB This error means Active Directory's database has internal corruption. You'll see it during replication between domain controllers. Here's how to fix i...
0X000026AF This DNS server isn't enlisted in the specified directory partition. We'll re-enlist it using ADSI Edit or PowerShell. I've seen this after domain con...
0X00002177 This error means a domain controller can't replicate because its AD schema is too old. The fix is updating the schema or demoting the offending DC....
0X0000208D Active Directory can't find an object you're looking for. Usually a replication mismatch or a stale reference. Here's how to track it down and kill it...