We are currently upgrading from the watchguard x500 to a x750e. When we use outlook web access from IE the inbox displays "There are no items to be displayed in this view"
If we try using firefox it all works fine. If we plug the old x500 back in then it also works fine.
We have copied the same port rules from the x500 to the x750e but was wondering if there was another new feature that might need switching off.