Cannot browse Microsoft Information Store to perform a restore.

Good morning,

We've got a problem with restoring emails when using backup exec 2012 and Exchange 2010. Before I outline the issue the backups are sucessful and we can restore items using the search functionality (which to be honest is rubbish). 

Step 1 - Restore Wizard - Micorsoft Exchange

Step 2 - Micorosft Exchnage mailbox items

Step 3 - Successfully validate all the credentials

Step 4 - The problem, it will not allow us to expand the Microsoft Information Stores and browse individual mailboxes or items to restore

Backup Exec Server:

• OS: Windows Server 2008R2 (64bit)
• BE Version: 14.0 Rev. 1798

Exchange Server:

• OS: Windows Server 2008R2
• Exchnage Version: 2010 - 14.1 (Build 218.15)

Has anyone got an suggestions or tech articles that might be useful.

Mark