Hi On Exchange Servers you get the Event: Event ID 9646 : Mapi session /o=My Company/ou=First Administrative Group/cn=Recipients/cn=user” with Client Type WebServices exceeded the maximum of 250 objects of type “objtMessage”. How to solve : First, Do A Backup To Registry (on all server that you change). On the server, start up regedit. Navigate to theContinue reading “Event ID 9646: Mapi session exceeded the maximum objects type”