MS Data Encryption Policy - controlling access

ZCM 2020.  This may be more of a Microsoft question, but I've spent some time searching and have yet to find an answer.  I just created a test policy for MDEP.  The policy just encrypts a single folder and is assigned to my PC.  As soon as the policy applied, the folder and its files changed color signifying they were encrypted.  I logged into the PC as another user assuming the files would be encrypted and the second user would not have access.  But I was able to open and read the files.  Am I missing something within the ZCM Security Policy or is there something additional required on the Windows side to make this work properly?