Symptoms
A Role Based Access Control (RBAC) role assignee who you want to restrict from running *-Message cmdlets, such as the Export-Message cmdlet, cannot be restricted from running these cmdlets by using a custom write scope.
Resolution
To resolve this issue, install the following update rollup:
2936871 Update Rollup 6 for Exchange Server 2010 Service Pack 3
Status
Microsoft has implemented this feature in Update Rollup 6 for Exchange Server 2010 Service Pack 3.
More Information
For more information about RBAC, go to the following Microsoft website:
General information about RBACFor more information about *-Message cmdlets, go to the following Microsoft website:
General information about mail flow cmdlets For more information about a similar issue for the *-Queue cmdlets, click the following article number to view the article in the Microsoft Knowledge Base:
2501070 A RBAC role assignee can stop queue processing on an Exchange Server 2010 Hub Transport server or an Exchange Server 2010 Edge Transport server that is outside the role assignment scope