HI , I'm trying to replicate AD LDS from old server to new server . Replication was successful last week . For installing an application, i have changed the instance account name to a different account than the replica account . once the s/w is installed , renamed the instance account back to the replica account .since then replication fails and below message appears. The attempt to establish a replication link for the following writable directory partition failed. Directory partition: CN=Schema,CN=Configuration,CN={----} Source directory service: CN=NTDS Settings,CN=yyyyy,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,CN={xxxxx} Source directory service address: yyyyy:zzzzz Intersite transport (if any): This directory service will be unable to replicate with the source directory service until this problem is corrected. User Action Verify if the source directory service is accessible or network connectivity is available. Additional Data Error value: 1772 The list of RPC servers available for the binding of auto handles has been exhausted. Any guidance will be much appreciated. Thanks