I work with Target Premium solution, and we always send certain at_property value in mbox calls.
Documentation tells that "Properties and Permissions functionality is available as part of the Target Premium solution.": https://experienceleague.adobe.com/docs/target/using/administer/manage-users/enterprise/properties-o...
I never worked with Target Standard and I am curious should at_property value be sent in mbox calls when Target works in this mode ?
@Kirill812 'at_property' token is mainly used for managing Target user permissions. With Target Standard in the picture, we only have 1 workspace accessible to all users hence passing an "at_property" for mbox calls (when we have Target Standard) will not be of much use.
Hope this helps.