About Storage Foundations for Windows (SFW) and Exchange Instant Recovery
When you use the SFW VSS provider to create your Exchange IR snapshots, use Veritas Enterprise Administrator (VEA) rather than VShadow or Vssadmin to view and manage your snapshots. SFW resnaps a volume after a rollback restore, but the Microsoft utilities are not aware of the new snapshot. They falsely report that the snapshot does not exist.