If you create a multi day appointment (say a two week business trip from May 1st to the 14th) and then double click any day other than the first one of the appointment to make a change or comment said appointment will move dates. The issues seems come from the fact that if, for example, you were to click and hold on May 13th of the two week appointment and move the mouse AT ALL Outlook automatically tries to move the appointment to the 13th. I compared this to the PC version of Outlook and the PC version does not function this way. On the PC you have to drag the appointment to a day different than the one you originally clicked on before it will move the appointment. So my conclusion is that in Outlook 2011 if the mouse is not completely still throughout your double click Outlook assumes you are trying to drag it to the day you clicked on and moves the whole appointment.

I have confirmed this on multiple different Macs all updated to the latest version (14.3.7).

Anyone else had issues with this? Does anyone know of a fix or work around? The only thing I can think of is to tell the users to right click and select Open rather than double clicking. 

Any help would be greatly appreciated!

Thanks, 

Jonathan