Unable to apply custom permissions to ZIP file using AIP PowerShell Command

Hi,

I am trying to label the zip file using Set-AIPFileLabel command which accepts custom permissions. when try to open the labeled zip file system throws an error does not have permissions to open it even though their names are available custom permissions.

 I have observed the following when applied label to zip file.

1.  Only see Generic Protection option in the dropdown when try to label using Unified client.

2.  Selected users multiple text box is disabled when we open the labeled using PowerShell command zip file in unified client.

I did not see any permission Generic Protection in Custom Permissions PowerShell command.  

Please let me know if any one has experienced and fixed it.

Thanks