Office C2R Version 1711 8730.2127 - This product will not be updated.

I would check if one of or both regkeys are set:HKLM\software\policies\microsoft\office\16.0\common\officeupdate!enableautomaticupdates = 0HKLM\SOFTWARE\Microsoft\Office\ClickToRun\Configuration\UpdatesEnabled = False
If it is the case, close the Office applications, change the keys to 1/True and retest. If the issue is gone now and update is enabled, you must identify why these keys are set to 0/False. The first regkeys is controlled by Group Policies, the second is normally set during the setup or the user interface.