Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Mac OS Mojave is an upgrade from High Sierra, so apparently High Sierra was 32 bit
and Mojave is 64 bit. I can check with Apple, but your message says that my version of Office should work forever. Thanks for your help, but I'm not certain that is true.
MacOS has had 64bit support for a long time.
Support for 64 bit was added on version 10.5 - leopard - 2007. A long time ago but you could run both 32 and 64 bit applications . Mac OS are going to get rid of the 32 bit support soon which is why this is a problem for people like us who bought the 32 bit version of Office.