It appeared that there are alternative solutions to syncing contacts, calendar, mail.

One of them is Google Sync for Windows Mobile devices. It allows to synchronize the built-in Mail, Calendar and Contacts apps on your Windows Mobile device with your Google account. With Google Sync you can Synchronize your calendar and contacts with Google.

Features:

• Gmail sync. Get your Gmail pushed directly to your Windows Mobile device. Your inbox is always up to date no matter where you are, or what you're doing.
  
• Synchronize your contacts. Get your Google contacts quickly and easily to your Windows Mobile device. With Sync, you can have access to your address book at anytime and place that you need it.
  
• Get calendar alerts. Using your Windows Mobile device's native calendar, you can now access your Google calendar, and be alerted for upcoming appointments with sound or vibration.

Please note that Google Sync uses the Microsoft Exchange ActiveSync protocol. When setting up a new Exchange ActiveSync account on your Windows Mobile device, existing data may be removed from your phone. Please make sure to back up before you set up Google Sync.