I was having difficulties to synchronize my Blackberry with Windows 10. In order to fix the problem the technician put my Blackberry back to the factory initial configuration which did not included accepting or declining invitations. While I was at least able to synchronize my BB with Windows 10 for about 24 hours, still I was not able to accept or decline from my Blackberry any invitations. After 24 hours the problem of synchronization occurred again. I then decided to call my own IT technician to put back Windows 7 in order to be able to synchronize my Blackberry and since then I haven't had any synchronization problem. Unfortunately, I have not found any technician able to configure my Blackberry with the function of accepting or declining invitations. It has been a very negative experience as I have limitations in getting back to my clients from my Blackberry and I have to wait to be back at my office to confirm or decline invitation from my computer.