This is a bit unfortunate for my use case.
Do you have an idea to circumvent this restriction somehow?
From the documentation https://help.hana.ondemand.com/help/frameset.htm?ed1c6732d4214c68846ab9813b9df943.html I learned the concept of a proxy bridge. Could the result of such a proxy bridge again be exposed via Mobile Documents? If I understand this correctly, I could calculate inside the proxy bridge which folders a user should currently see and expose only this specific folders (eg via filtering), right? I could then set the push flag on the exposed repo. Does the CMIS API and the push flag support user specific content of a repo? The mentioned documentation page says "Apache OpenCMIS project contains a bridge module". Could you direct me to this module (I only found the CMIS to JCR bridge which apparently was dropped with OpenCMIS 0.12.0)?