I just migrated from Exchange 2007 to Exchange 2013. The 2007 server has been successfully uninstalled. Most mobile phones automatically reconnected and continued working, but some are not. They appear to be connected via the settings in their phone... but do not see their mail, and cannot send and receive.
In the event viewer on the exchange 2013 server I see the following error:
An exception occurred and was handled by Exchange ActiveSync. This may have been caused by an outdated or corrupted Exchange ActiveSync device partnership. This can occur if a user tries to modify the same item from multiple computers. If this is the case, Exchange ActiveSync will re-create the partnership with the device. Items will be updated at the next synchronization.
How can I disassociate the old, corrupt partnership and initiate a new, good one?