Adobe Acrobat DC not working to "Save as PDF" from Word or Excel after the first time you do it each day.

Windows 10 desktop computer, running Office 365, Adobe Acrobat DC doesn't want to show the Save as PDF option from the File Menu after the first time its used. The option to Save as PDF comes up in Word or Excel, once, then goes away. I show the COM Addin is still loaded according to the word application from File / Options / Com Addins area. But it would seem it is not if the Save as PDF option isn't listed in the file menu. The end user can click on File / Save As choose the document type as PDF and then its fine but she has to do this so frequently that, that is a major issue.