One of the big advantages of using IceWarp Server's SyncML Server is the ability to synchronize all your mobile clients with the same central store of data, your IceWarp Server account.
Example:
You can synchronize each client's contact list and, after a couple of synchronization rounds on each client, they will all have the same data. Update a phone number or email one your PDA, and that data will be updated within your IceWarp Server account, and then to your PocketPC, Smartphone and even MS Outlook (using the Merak Outlook Connector connector).
Never have the wrong information in your hands again!
The following picture shows the synchronization process you would need to follow to synchronize three Clients with IceWarp Server and have the same information available in each.
NOTE - that the red crosses mean there is no change in client content

From the picture you can see that you need to synchronize all your clients in order, then all except the last should be synchronized again.