To manage new devices trying to connect to email for the first time, configure Exchange to either Block or Quarantine devices from an organizational level. Exchange can be configured through either an Exchange PowerShell session or web interface.
- Configure your organizational settings so that they block or quarantine devices.
Blocking devices blocks the device outright while quarantining provides you more visibility to unknown devices.
Quarantining also uses more processing power.
- Open the Exchange PowerShell command window from the Exchange Server and enter the required command.
PS C:\Windows\system32> Set-ActiveSyncOrganizationSettings –DefaultAccessLevel Block
PS C:\Windows\system32> Set-ActiveSyncOrganizationSettings –DefaultAccessLevel quarantine