Could not access Exchange Server. The dispenser will queue the current item and sleep for 60 seconds.

Hi Team,

I am continuosly getting below event ID.Any solution for this. EV 10.0.1

Log Name:      Symantec Enterprise Vault
Source:        Enterprise Vault
Date:          4/02/2013 1:00:00 PM
Event ID:      3419
Task Category: Archive Task
Level:         Warning

Description: Could not access Exchange Server. The dispenser will queue the current item and sleep for 60 seconds.