Microsoft Outlook, which is part of the Microsoft Office software suite, includes a calendar feature that allows users to schedule events and create reminders for important dates. If entries in the Outlook calendar are not showing up correctly, it may be a sign that the calendar data has been corrupted. To resolve the issue and recover the information, you need to run a series of commands.
Make sure the Microsoft Outlook application is not open or currently running.
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Open the Start menu and click on the "Run" icon.
Type "outlook /cleanreminders" into the dialog box that appears and then hit the "OK" button.
Open the "Run" dialog box again.
Type "outlook /resetfolders" into the box and hit "OK."
Relaunch the Microsoft Outlook program. Your calendar information will now be repaired and recovered.
Things You'll Need
PC running Windows XP or later
Microsoft Outlook 2003 or later