Unable to open PDF from the vhdx of an RDS server

Hi All,

We are running Adobe Acrobat Reader DC 2018.011.20038 on RDS servers (Windows Server 2016).

When testing if the application was installed properly, we have realized that we are unable to open PDF files which were located locally on the vhdx of the server.

For example, if the PDF file is located on the User Desktop (C:\Users\User1\Desktop), we are getting the following error message:

     There was an error opening this document. Access denied.

We were able to open the PDF from User redirected folders such as "My Documents" on the RDS server... so the installation of Adobe Acrobat Reader is not corrupted.

Yes, we know, a lot of people had the issue mentioned above and they by-passed it by disabling the Protected mode in Adobe Acrobat Reader... but unfortunately, this is an unacceptable solution for us.

We also read that there is a known bug with the Symbolic link... but this isn't really a symbolic link.

Anyone have had this problem and ever found the root cause and the proper solution to fix it?

Any help is appreciated!