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Replication access was denied when using Legacy Password Sync

Error "Replication access was denied." when attempting to sync legacy passwords between directories

Written by Jamie Richard

Updated at February 16th, 2026

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Table of Contents

Problem / Error Solution Verification

Problem / Error

When attempting to synchronize passwords between Active Directory domains, you get an error in the PowerSyncPro Message logs reporting that:

Replication access was denied.

From Schedule:

From Message Logs:

Solution

In order to synchronize passwords, your PowerSyncPro service account in the source domain must have permissions to replicate directory changes.

From the source domain:

  • Launch AD Users and Computers
  • Ensure that Advanced Features are enabled under the “View” menu
  • Right click on the root of the target Active Directory Domain (e.g. ecorp.xyz) and select Properties.
  • Click the Security Tab
  • Add your PowerSyncPro Service account to the permissions list.
  • Allow:
    • Replicating Directory Changes
    • Replicating Directory Changes All
  • Apply Settings and test.

 

 

For the target domain:

Ensure that your target domain service account has full control over user accounts.  This can be via Domain Admin, or more granular permissions.  We must be able to modify the RC4 password for users in the target domain.

Verification

Once permissions are verified on the source and target, from the PowerSyncPro schedule panel right click the “Password Sync” option and start the job.  It should complete without errors.

mistake fault error

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