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Cisco Unity 4.0 is stuck in UMR mode and the user receives the "An attempt to access the Primary Exchange Mailbox Store by AvUMRSyncSvr via MAPI has failed" error message in the Event Viewer

Core Issue

In this situation, the Cisco Unity server is not synchronizing with the Exchange server, and voice messages are not delivered by Exchange due to permissions   problems. Cisco Unity also displays error messages indicating that the partner server is offline or having  difficulty with log in. The permission wizard and the registry says the permissions are correct.


In the System Manager, remove permissions at the server level by taking off inheritance. Put inheritance back on so permissons are propagated from the top level. To accomplish this, perform these steps:

  1. Run the permissions wizard.
  2. Reboot the server. Exchange should be up and running, and messages should move from the Cisco Unity MTA folder.

For more information, refer to these documents: