When a mobile device is connected to your Exchange account in order to sync mail, calendar, contacts, etc., that mobile is added to your account.
How to see what device is connected to the mailbox?
- In Outlook Web App click on the Settings button and then click on Options;
In the Feature Pane, click on phone and the then the mobile devices tab will be available.
In the List View we can see that a mobile device is connected to this mailbox.To see the mobile device details either click on the Edit button, either double click the device.
Here we can see the sync dates, # of synced folders, mobile network, phone type, etc.