Users may run into a serious problem while integrating the Advanced CMS Add-on for Optimizely 11, which causes the sender's address to be incorrectly specified and prevents the sharing of external review links. This situation occurs more frequently when the necessary sender address setup is disregarded. Making sure that every external communication has a working sender address is the first step in solving the problem. This is done by correctly configuring the Notification Options within the service configuration context.