How to solve Error 501 Not Implemented

Last update:
Created :
Written by Thomas Speekenbrink

Overview:

When testing your connection to Exchange or the Offline Address Book (OAB) in the Technical Settings, you receive the error message: Error (501) Not Implemented.

How to:

The Exchange Server needs to be checked, the error is related to a Load Balancer configuration / setting. Unfortunately, we are unable to assist further when this error is seen.