Hi Ericr,
Sorry for the delay in response.
As you have mentioned above that you are using the Adobe Reader DC on a Windows server 2016, please make sure that you are using the compatible version of the application.
Adobe Acrobat Reader DC does support Windows Server 2016, please check this link Overview — Acrobat and Adobe Reader Release Notes for more information.
Also, refer this help document Adobe Acrobat Reader DC system requirements
Make sure you update the application to the latest version available.
Check if that helps.
Let us know if you still experience the issue.
Regards,
Meenakshi