CVar showToastWindow

Whether to show a Battle.net window to announce your REALID friends logging on or off.

Default Setting

 * 1

Possible Settings

 * 0:Off
 * 1:On

Changing this setting
In-game, type the following /console showToastWindow setting

Alternatively, you can exit wow, open the Config-cache.wtf file, and add the following line: SET showToastWindow setting