MobSync.exe
(Microsoft)
Microsoft Synchronization Manager. This program, which is part of Internet Explorer 5.x/6, runs in the background when you are using the "View pages offline" feature of Internet Explorer, and you have set parameters for when your pages should be automatically synchronised, or you decide to manually synchronise your offline content with the web through the "Start \ Programs \ Accessories \ Synchronize" function. This program will also run if you are doing development using Microsoft SQL 7 and using SQL 7 replication.
Recommendation :
Harmless. If you never use the "Synchronize" function, then disable it with Startup Manager.