CalCheck – The Outlook Calendar Checking Tool

Over the past year or so I have been working on this tool - adding functionality and checks based off my experience as an Outlook engineer, and from suggestions given by other engineers. Well, this February the tool has been released so that all our customers can download and use it to check for potential problems in their calendars - which will hopefully be a real time saver when you encounter a problem with your Outlook Calendar - or with a user’s Outlook Calendar in your organization.


Download CalCheck from the Microsoft Download Center.

This utility works with:

  • Microsoft Office Outlook 2003
  • Microsoft Office Outlook 2007
  • Microsoft Office Outlook 2010 (32-bit)
  • Microsoft Office Outlook 2010 (64-bit)
  • Microsoft Exchange Server 2003
  • Microsoft Exchange Server 2007
  • Microsoft Exchange Server 2010

Note: The 64-bit version of this tool is only for use with the Microsoft Outlook 2010 64-bit version.

The download is a ZIP file - just unzip it in an empty directory, open a command window in that directory, and run it.

What CalCheck does

The Calendar Checking Tool for Outlook (CalCheck) is a command-line program that checks Microsoft Outlook Calendars for problems. The tool opens an Outlook profile to access the Outlook Calendar. It performs various checks, such as permissions, free/busy publishing, delegate configuration, and automatic booking. Then each item in the calendar folder is checked for known problems that can cause unexpected behavior, such as meetings that appear to be missing.

As CalCheck goes through this process, it generates a report that can be used to help diagnose problem items or identify trends.

Read the complete blog at

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