Correct - the existing email messages usually mention the "My Messages" button which no longer exists. And yes, we will be working on adjusting the content in those email messages.
In the meantime, one thing you can do to help members now is add an additional custom link to the Message Center, either via the mega menu or a widget menu, using a "My Messages" label so that members will find it more quickly. This can be done via CU Publisher. If you are not currently a CU Publisher subscriber, reach out to the ISRC and they'll be happy to help!