If a make a posted appointment in GroupWise Client 2012 , the appointment shows up correct on my ipad3 with IOS 6. But i can't modify this appointment on my ipad. The only thing i can do is to accept or decline the appointment.
If i test the same with an ipad2 on ios 5.0 then i can modify the appointment without problems. Whats going wrong? Is there something i'm missing?

GroupWise 2012 Sp1 on OES2 SP3 Cluster
Novell Data Synchronizer 1.2.3 Build 882

Thank you!