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Server 2012R2 AD access and replication problems

%3CLINGO-SUB%20id%3D%22lingo-sub-224631%22%20slang%3D%22en-US%22%3EServer%202012R2%20AD%20access%20and%20replication%20problems%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-224631%22%20slang%3D%22en-US%22%3E%3CDIV%3EI%20have%20a%20Server%202012R2%20which%20has%20several%20symptoms%20related%20to%20AD%20access%20and%20replication.%26nbsp%3B%20Here%20are%20some%20examples%20and%20some%20related%20event%20log%20descriptions%3A%3C%2FDIV%3E%3CDIV%3EGPMC%20cannot%20connect%20to%20the%20AD.%3CBR%20%2F%3EDFRS%20replication%20fails%20-%20Error%3A%201726%20(The%20remote%20procedure%20call%20failed.)%3CBR%20%2F%3ESMB%20outbound%20connections%20sometimes%20fail%20-%20The%20Kerberos%20client%20received%20a%20KRB_AP_ERR_MODIFIED%20error%20from%20the%20target%20server.%3CBR%20%2F%3EKnowledge%20Consistency%20Checker%20(KCC)%20was%20unable%20to%20form%20a%20complete%20spanning%20tree%20network%20topology.%3CBR%20%2F%3EDNS%20-%20The%20DNS%20server%20has%20encountered%20a%20critical%20error%20from%20the%20Active%20Directory.%20Check%20that%20the%20Active%20Directory%20is%20functioning%20properly.%3C%2FDIV%3E%3CDIV%3EThe%20server%20is%20a%202012R2%20Hyper-V%20guest%2C%20it%20was%20hosted%20on%20a%20Fujitsu%20server%202012R2.%26nbsp%3B%20It%20has%20been%20moved%20(VHD%20only)%20to%20a%20Dell%20server%202016%20host%2C%20with%20a%20new%20vNIC%20and%20Hyper-V%20switch.%26nbsp%3B%20The%20problems%20described%20show%20no%20change%20both%20before%20and%20after%20the%20move.%26nbsp%3B%20The%20SYSVOL%20share%20seems%20to%20be%20normal.%26nbsp%3B%20The%20Windows%20firewall%20has%20been%20disabled.%26nbsp%3B%20SFC%20%2FSCANNOW%20and%20DISM%20health%20checks%20and%20restores%20have%20been%20completed.%3C%2FDIV%3E%3CDIV%3ESome%20help%20would%20be%20appreciated!%3C%2FDIV%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-224631%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EActive%20Directory%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ENetworking%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EWindows%20Server%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-225198%22%20slang%3D%22en-US%22%3ERe%3A%20Server%202012R2%20AD%20access%20and%20replication%20problems%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-225198%22%20slang%3D%22en-US%22%3E%3CP%3EDuplicate.%3C%2FP%3E%0A%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FWindows-Server-for-IT-Pro%2FServer-2012R2-AD-access-and-replication-problems%2Fm-p%2F224629%23M822%22%20target%3D%22_blank%22%3Ehttps%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FWindows-Server-for-IT-Pro%2FServer-2012R2-AD-access-and-replication-problems%2Fm-p%2F224629%23M822%3C%2FA%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E
Bob Smith
Occasional Contributor
I have a Server 2012R2 which has several symptoms related to AD access and replication.  Here are some examples and some related event log descriptions:
GPMC cannot connect to the AD.
DFRS replication fails - Error: 1726 (The remote procedure call failed.)
SMB outbound connections sometimes fail - The Kerberos client received a KRB_AP_ERR_MODIFIED error from the target server.
Knowledge Consistency Checker (KCC) was unable to form a complete spanning tree network topology.
DNS - The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly.
The server is a 2012R2 Hyper-V guest, it was hosted on a Fujitsu server 2012R2.  It has been moved (VHD only) to a Dell server 2016 host, with a new vNIC and Hyper-V switch.  The problems described show no change both before and after the move.  The SYSVOL share seems to be normal.  The Windows firewall has been disabled.  SFC /SCANNOW and DISM health checks and restores have been completed.
Some help would be appreciated!
1 Reply
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