Is it possible to disable the auto-update feature of the messenger client?

The client update setting in console-one (MessengerService - Novell Messenger - Client Update) dont let you disable the update requestor. By not setting Version or Date Information, the users are still informed about a newer version, but not required to update it.

In our environment the user pc's doesn't have admin or poweruser rights. So the update via this function fails. We use the ZENworks-AOT for the update. Because the new version is not pushed to all pc's at the same time, lots of users would see the info, and try to install it...

Thanks for any info on this issue.