If you synchronize calendars using CodeTwo Outlook Sync, the time of some appointments and meeting requests may appear off. To start with, make sure the same Time Zone is configured on both machines in Control Panel > Clock, Language, and Region > Date and Time.

If the Time Zone is set correctly on both machines, scan the PST files (Outlook data files) on both machines using SCANPST.EXE.  For more information go to: How to repair Outlook files (PST) using SCANPST.EXE installed together with Microsoft Outlook