UCS & OX user / contact fields missing

weve set up a test instance of UCS with Open Xchange using the build in services.
It seems like not all fields from UCS are synced to OX.
Either they are missing all together or theyare blank (e.g. the avatar/image).

How can this be fixed?

Sync of the users image is currently not supported by the integration.
I have created a feature request: http://forge.univention.org/bugzilla/show_bug.cgi?id=46077

thank you.
Is there a way to select other fields to be synced?
We have one Account we added things like the birthday and it didnt sync either.

Most fields are synced, but unfortunately some exist multiple times and for those it is not apparent which ones are used. Birthday is such a field. There is a “birthday” field in the “contacts” tab, which is the one that’s synced.