If you are logged in to Administration Console as an administrator, you have the option to search for and deregister devices that are registered to other users. Users can manage their own devices from the User Portal page after they log in.
To deregister mobile devices:
Log in as an administrator to Administration Console.
In Administration Console Dashboard under Administration Tasks, click User Devices.
Select the IDP cluster that contains the user.
If you want to search for the devices belonging to a particular user, select the user name in the User field.
or
Browse the list of devices Administration Console displays.
Click the Delete icon next to the device you want to deregister, then click OK on the confirmation message.
After a mobile device has been deregistered, the device can be registered to a new user. However, the MobileAccess app on the device must first be deleted and reinstalled. For more information, see Section 8.6.3, Deleting and Reinstalling the MobileAccess App on a Device.