Adobe Acrobat DC (64-bit) Auto installed - Reader No longer installed

Adobe Acrobat DC Reader was running on 2 of my computers.  Then a use wasn't able to open a pdf file, come to find out - Reader is no longer installed and Adobe Acrobat DC (64-bit) is installed.  We didn't purchase a license for the users so we are uncertain as to what happened.  No one in our IT department worked on the 2 computers.  Is Adobe pushing a trial version in order for users to get a license?  Is Adobe Acrobat Reader not going to be used?  We are all puzzled by this.  It happend on 1 computer 11/13/2021 and the other today 11-16/2021.