High CPU usage can be caused by one of the following:

  1. Antivirus software scanning Policy Patrol folders.
  2. Backup software scanning Policy Patrol folders.
  3. Either Antivirus/Backup software scanning C:\Windows\Temp folder. C:\Windows\Temp is used by Policy Patrol to transfer email through to Exchange Server.

Solution

To resolve this, please exclude your antivirus or backup software from scanning the following directories:
  1. C:\Program Files\Red Earth Software (on 32-bit systems), and C:\Program Files (x86)\Red Earth Software (on 64-bit systems) or C:\Program Files (x86)\OPSWAT (on 64-bit systems)
  2. C:\Windows\Temp
  3. Exchange directories

For specific instructions about which Exchange directories to exclude, please consult the following resources:

Directories to exclude on Exchange 2016: http://technet.microsoft.com/en-us/library/bb332342.aspx