Sharepoint picture mapping with Active Directory

I got an issue with Sharepoint 2013 Profile Services. We use pictures stored in Active Directory which are shown in Outlook 2010 and Lync succesfully. Now I configured an Actice Directory import, which is almost succesfully. All profiles are synchronisied and even manual added AD mapping like facsimile number works fine. So I mapped thumbnailPhoto to photo as it works under my Sharepoint 2010 farm fine. After that I started powershell command

Update-SPProfilePhotoStore -MySiteHostLocation http://mysharepointserver -CreateThumbnailsForImportedPhotos $true

which completes without any error messages, nethertheless no pictures are shown.

Any ideas, suggestions, more information needed?

Thanks for help