After I installed Catalina on my iMac I noticed that all my MS Office for MAC iCons on my doc had circles with a line through them. If you attempt to use one you will be launched to the App store where you can purchase the MS 360 subscription service. That's total BS. I paid a lot of money for my Office for Mac package which works perfectly well. So, M$ (and or Apple) wants to force Mac owners to belly up for the subscription service, or not upgrade to Catalina. I immediately logged into my 13" Retina laptop and turned off auto updates. As I launched each office package I was asked if I wanted to go to the App store. Yeah right, I responded cancel. After I repeated the action for each Office package I was not prompted again. And, I even had office updates ready to install from MS. I don't know when, if ever that I will upgrade to Catalina on my laptop. I rarely use the MS software, but it's there if I need it. Beware!