Exchange ActiveSync in Active Directory listed under a user

I have a SBS Server 2011, and when removing a user came across users having 'ExchangeActiveSyncDevices' under their name within AD. This is the first time I have came across this.

I have compared an identical SBS Server 2011 and as users are listed in My Business > Users cannot seem to locate this option.

Can someone explain in further details how ExchangeActiveSyncDevices works, what it does. I would like to confirm what happens if ExchangeActiveSyncDevices is deleted from a users. Would this leave the user unable to sync emails etc?
Stuart SmithTechnical Director Asked:
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Murali ReddyExchange ExpertCommented:
ExchangeActiveSyncDevices refers to the activesync devices (mobile devices like iphone etc) connected to that particular mailbox.

When you are removing the user, these devices will not be authenticated to login (yes, he can't sync emails anymore with these linked devices).

If you delete the activesync device from a user, he has to reprovision the device.

But I'd suggest to remove these using exchange consoles than from AD to have the things clean.

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