How to stop message "attachment has changed, do you want to save..

[DaveHause]

Can this be turned off? It happens whether or not I have made any changes to
the attachment. Has MS now defined any opening of a file as a change?

 

[Roady [MVP]]

It depends on how you open it and in which program.
For details see;
http://www.msoutlook.info/question/175