Manage MAPI over HTTP

1. Set-OrganizationConfig -MapiHttpEnabled $true

2. Set-CasMailbox <user or mailbox ID> -MapiHttpEnabled $true

3. 
   
   
   Test-OutlookConnectivity -RunFromServerId ContosoMail -ProbeIdentity OutlookMapiHttpSelfTestProbe
   
   
   
   
   A successful test returns output that's similar to the following example:

https://technet.microsoft.com/zh-tw/library/mt634322(v=exchg.160).aspx