We have already turned off wireless contact sync on the bes. When we try to sync through cable we get the error that the blackberry has been configured to sync contacts wirelessly and it fails. We already have it turned off on the bes and I know how to turn it off on the newer models, but the 7250 appears to lack the option to turn it off in the options menu under contacts. Is it possible to turn off wireless sync for contacts on the device itself?

Several things must be done to sync a device to a second desktop which currently setup on the BES to your office desktop. You can leave the wireless Synchronization on for the BES for your office desktop to keep your office desktop and BlackBerry 7250 harmonized. When you wish to sync BES setup device to a second PC, follow these simple steps.
1: Second PC must have the Desktop Manager installed and the Synchronization settings configured.
2: When wanting to sync up a device that is configured to a BES application with the second desktop you must go in prior to connecting with the USB and shut-off in Calendar; Address Book; Tasks and Memopad as follows: Go to Calendar > click the tracking wheel and scroll down in the drop down menu to Options - Click > Scoll down to Wireless Synchronization - change from Yes to No. > Click Save. This step must be done with each Wireless Synchronization feature (Address Book; Tasks and Memopad) that are turned On ("Yes").

When you have completed your Synchronization with your second desktop you can go back and turn the Wireless Synchronization features back on. Side Note: you may choose as example to use the BES to keep your e-mail; calendar and address book up to date through the Wireless Synchronization; but choose to leave Tasks and Memopad off. This is fine!

If you have further questions, please do not hesitate to ask.