Run: netdom resetpwd /server:Source_DC_Name /userd:Domain\Admin /passwordd:* . When to Rebuild
The account or the DC computer account doesn't have "Replicating Directory Changes" rights on the naming context. Dsreplicagetinfo(Pending_Ops Null) Failed Error 0X2105
The destination DC's computer account is missing critical flags like SERVER_TRUST_ACCOUNT or TRUSTED_FOR_DELEGATION . Dsreplicagetinfo(Pending_Ops Null) Failed Error 0X2105
You might simply be running DCDIAG without administrative privileges. Dsreplicagetinfo(Pending_Ops Null) Failed Error 0X2105