Cisco Unity Disaster Recovery Backup fails with the "Errors encountered backing up n mailboxes" error message in the application log

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Core Issue

This error message indicates that the email addresses (users) in the Exchange configuration are hidden for those mailboxes that are not backed up.

Resolution

Complete these steps to solve this issue:

1. Verify that the email addresses are not hidden in the Exchange configuration.    
   
2. If they are hidden:    
   
   1. Uncheck the box to hide the subscriber account in Active Directory Users and Computers.        
      
   2. Go to the Exchange Advanced tab.        
      
   3. Uncheck Hide from Exchange Address list for users that are not getting backed up.

Refer to these documents for more information:

• Backing Up and Restoring a Cisco Unity System  
  

• Disaster Recovery Backup and Restore   
  
• Cisco Unity Tools