I worked on an issue a couple of weeks which was really interesting. During a run of the archiving task it was observed that NO shortcut processing was taking place.
At first I thought that the movement tracking wasn’t enabled in the mailbox policy, but when checked it looked just like this :
So shortcut processing should work… but we couldn’t see any reference to it in the archiving task dtrace.
After a lot of searching it was discovered that it was because the IPM.Note.EnterpriseVault* message class was added to the directory, and not enabled on the mailbox policy itself. So, on the properties of the Directory in the VAC you would see this :
And on the policy you would see this :
The net result of those two things is that nothing happens with shortcut processing, because the message class isn’t selected. It turns out this particular customer had been testing some policies and left things like this, they fixed things by removing the entry on the Directory properties.