I'm using the new REST api in 2013 to retrieve information about the current user. My issue is that I always get zero results for the Groups element. This is what I'm using:
I do get information about the current user in the response, it's just that groups is always empty. When I do send the request to see site groups, it returns all the appropriate site groups.
I have a feeling that this may be related to some configuration in SharePoint, possibly User Profile Synchronization, but I cannot find anything online. I would appreciate some help.