Teşekkürler Hocam,

Ama şöyle diyim, daha önce bu 2 dc -im Active Directory Sites and Services üzerinden replikasyonu sağlıyordu.
DC lerden birinde problemler oluştu. Ve şu an DC ler birbiri ile haberleşemiyor.
2 DC ye baktım. Problemli olan DC de event viewer da aşağıdaki hataları görüyorum.

Bunlar Directory Services içerisinde;

**1865
The Knowledge Consistency Checker (KCC) was unable to form a complete spanning tree network topology. As a result, the following list of sites cannot be reached from the local site.

**1311
The Knowledge Consistency Checker (KCC) has detected problems with the following directory partition.

Directory partition:
CN=Configuration,DC=our,DC=local

There is insufficient site connectivity information in Active Directory Sites and Services for the KCC to create a spanning tree replication topology. Or, one or more domain controllers with this directory partition are unable to replicate the directory partition information. This is probably due to inaccessible domain controllers.

User Action
Use Active Directory Sites and Services to perform one of the following actions:
- Publish sufficient site connectivity information so that the KCC can determine a route by which this directory partition can reach this site. This is the preferred option.
- Add a Connection object to a domain controller that contains the directory partition in this site from a domain controller that contains the same directory partition in another site.

If neither of the Active Directory Sites and Services tasks correct this condition, see previous events logged by the KCC that identify the inaccessible domain controllers.
For more information, see Help and Support Center at

**1566
All domain controllers in the following site that can replicate the directory partition over this transport are currently unavailable.

Site:
CN=Default-First-Site,CN=Sites,CN=Configuration,DC=our,DC=local
Directory partition:
CN=Configuration,DC=our,DC=local
Transport:
CN=IP,CN=Inter-Site Transports,CN=Sites,CN=Configuration,DC=our,DC=loc al

For more information, see Help and Support Center at