Let us syncronize with a mobile phone

If I want to synchronize this program with my phone, I have to export all data to Outlook and then let Outlook do the synchronization.

You make the same mistake most programmers make. You take it for granted that we usually use Microsoft Outlook.
Your target group should probably be the ones that do NOT use Outlook. Make this a "standalone program" that will let me control and organize my staff and my meetings. All of my staff use mobile phones, I want to be able to use a computer AND the mobile phones, without registering everything twice. Synchronize would be great.