Many of the Exchange Admins might already be familiar with the dreaded checkbox of doom , which causes issues with move request and Mobile devices. Post by MVP Tony Redmond here explains this in detail. Scenario & the Problem at hand : When a User connects to the Exchange Server using his Mobile device, then after the authentication the Exchange Trusted Subsystem creates msExchActiveSyncDevices Objects for the User. This will be evident from the below screenshot for one of the User in ADSI edit. Now what if the Exchange Trusted Subsystem doesn't have permissions on the AD User to create those Objects , all hell is let loose. This was the case I was tackling recently and searching each User in the Directory which had this checkbox of doom unchecked manually is not feasible (am lazy).
Infra + Dev's ramblings