Change schedule on AADSync for Office 365

By default the AADSync (link) runs every 3 hours on the AADSync server. This is defined by the scheduled task that is created during the installation.

To change the synchronization interval I did the following:

1. Add "SYSTEM" to AADSyncAdmins group
   
2. Create a new scheduled task (to be run as SYSTEM)
   
1. Trigger: Run it once (and set repeat to every 15 minutes and run indefinitely)
2. Action: "C:\Program Files\Microsoft Azure AD Sync\Bin\DirectorySyncClientCmd.exe"
3. Reboot server
4. Run task once manually