Run as different user. Strange behaviour

Dynamics AX shortcut may start different AX session for your currently user, and for user which has been chosen from menu "Run as different user"

This is because Dynamics AX is starting with default configuration which has been set in Dynamics AX Configuration utility. 
This configuration is set separately for every single user from that Windows system when Dynamics AX Client is installed.

So, when you're starting Dynamics AX for different user, but from your user session (Run as different user) it takes AX configuration from that different user, not from yours.

May be obvious, but sometimes it can be a little surprise.