You are seeing "Symantec" would like to access data from other apps popup on your macOS devices with the DLP agent installed. After clicking on Allow, the message reappears and you want to get rid of reoccurring popups.
15.X
16.X
com.symantec.dlp.CUI requires Full Disk Access permissions.
Provide Full Disk Access permissions to com.symantec.dlp.CUI under Privacy & Settings settings. If you are using MDM profiles to give necessary permissions, you may want to use the below settings in your profile:
Identifier: com.symantec.dlp.CUIanchor apple generic and identifier "com.symantec.dlp.CUI" and (certificate leaf[field.1.2.840.113635.100.6.1.9] /* exists */ or certificate 1[field.1.2.840.113635.100.6.2.6] /* exists */ and certificate leaf[field.1.2.840.113635.100.6.1.13] /* exists */ and certificate leaf[subject.OU] = Y2CCP3S9W7)