Prevent mobile access to Exchange email

I am trying to get users to use a BYOD/MDM policy for receiving emails on their smartphones and tablets.
Is there a way I can restrict exchange emails so users that ONLY users with the BYOD/MDM policy can get emails on their devices.
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StuartTechnical Architect - CloudCommented:
What Exchange version are you running?

I will presume 2013 - Active sync is enabled for all user by default but this is a flag that you can turn off

Set-CASMailbox -Identity "Alias" -ActiveSyncEnabled $false

This article shows how to disable or enable for all users -

You can then go ahead and enable the ones you want to have AS, by setting the ActiveSyncEnabled to True

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StuartTechnical Architect - CloudCommented:
Also take a look at this to manage the devices you allow -
AmitIT ArchitectCommented:
Something similar I answered, check it

You basically need to create AS policy and apply on users, for whom AS is required.
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