o365 connection, error accessing \bin\powershell.pid

As of v4.0.7, a known problem may cause a Discovery or Sync to o365 to fail. The error reads :

Powershell Error | The process cannot access the file ‘E:\Services\UnitySync-v4.0.7\bin\powershell.pid’ because it is being used by another process.

This error occurs if an o365 connection is running, and any other o365 connection is started. This has been identified as a bug and will be fixed in the next release.

As a workaround, only execute a single o365 connection at a time.