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There is problem in the active directory replication

when we replicate our DC to DR ADC. the replication is ok
but when we try to replicate the DR ADC with our DC. it gives following error

The following error occured during the attempt to synchronize naming context DPHFL.in from domain controller DPHFL-ADC-DR to domain Controller DPHFL-PDC001
The active directory can not replicate with this server because the time since last replication with this server has exceeded the tomestone life time.
The operation will not continue

please help to sort the problem

1 Solution
Sounds like they've only been talking one way for quite a while. Tombstone is what happens when a DC cannot communicate with another DC.

Can you ping/trace both ways?

Checkout this doc; http://technet.microsoft.com/en-us/library/cc949136(WS.10).aspx

Double check you DNS settings on the DCs.

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