Use the Clear-MobileDevice cmdlet to delete all data from a mobile phone. This action is often called a remote device wipe.

 This cmdlet is available in on-premises Exchange Server 2016 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the Clear-MobileDevice cmdlet to delete all data from a mobile phone. This action is often called a remote device wipe.

https://technet.microsoft.com/en-us/library/jj218658(v=exchg.160).aspx

Clear-MobileDevice -Identity WM_JeffHaymkass