edsaRemoveAllMsExchAttributes not functional in Active Roles 7.0
The edsaRemoveAllMsExchAttributes attribute is present in Active Roles 7.0, but performs no function. In previous versions, this attribute cleared all Microsoft Exchange attributes from an object, but left any associated mailboxes intact.
This issue has been identified as a product defect and is being tracked as Bug 625930.
In some circumstances, the edsaDeleteMailbox attribute may be used as an alternative.