While synchronization was running automatically as a scheduled task on the server, the server was shut down. When Synchronization completed on the next scheduled run, addresses and/or phones were deleted from records that should not have been deleted.
We resolved this issue in version 7.82.104, patch 20. Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
This patch addresses the issue of phone records deleted when a prior synchronization process has failed.