You can go to the hotel website at marriott.com and click 'sign in'. When you have logged on, click on 'my account' and a dropdown menu will appear with your point balance. If you click on 'my account overview', it will take you to a page where all your activity YTD and historical total nights will be there. You can also access account activity to track all your stays, any promos and points credited to insure accuracy. Hope this helps.
Yes. It does show total nights on that page, but it does not show the total number of points you have accumulated for the entire time you have been a Marriott rewards member. That is the info that I am looking for.