I sent a couple of test notifications from “Users” -> “Notify users” in WATO as a popup message in the GUI, but unfortunately to everybody. I don’t want people seeing these as they log in. Is there any way I can delete the user notifications?
Inside your site your can go to the folder ~/var/check_mk/web.
In the user folders you will find a file messages.mk. If you delete all messages.mk, the notifications are gone.