Up To Dateexpiration Date Which Are The Up To Date Microsoft Softwares?

Which are the up to date Microsoft Softwares? - up to dateexpiration date

I am a training site for an agency to update, to my knowledge. Have old Microsoft software on your system, but I think you should go with the latest software update. Today, the latest Microsoft Word is now called Microsoft Office? What is Microsoft Access? And Excel? Thank you for your help!