Outlook Command Line Switches may be used to clear errors within Outlook caused by personalization settings or corruption.


To run Outlook with a command line switch, use the following steps:


Windows XP:


Click Start.

Click Run.

Enter the following in the Run dialog box (with quotations):

"c:\program files\microsoft office\office14\Outlook.exe" /Commandswitch

Click OK.


Windows Vista/7/8:


Click Start.

Click All Programs.

Click Accessories.

Click Run.

Enter the following in the Run dialog box (with quotations):

"c:\program files\microsoft office\office14\Outlook.exe" /Commandswitch

Note: For 32-bit versions of Outlook running on 64-bit Operating Systems, you will enter the following (with quotations):

"c:\program files (x86)\microsoft office\office14\Outlook.exe" /Commandswitch

Click OK.

/checkclient Prompts to make Outlook the default application for email, news, and contacts.
/cleanautocompletecache Removes all names and e-mail addresses from the Auto Complete list.
/cleancategories Deletes any custom category names that you have created, and restores all categories to their default names.
/cleanclientrules Starts Outlook and deletes client-based rules.
/cleanfreebusy Clears and regenerates the free/busy information on the Exchange server. This switch affects Outlook and OWA data, and can only be used when connected to Exchange.
/cleanfromaddress Removes all manually added From: entries.
/cleanreminders Clears and regenerates schedule reminders.
/cleanrules Starts Outlook and deletes all client-based and server-based rules.
/cleanserverrules Starts Outlook and deletes server-based rules.
/cleansharing Removes all RSS, Internet Calendar, and SharePoint subscriptions, but leaves all previously downloaded content on your computer.
/cleansniff Deletes duplicate reminder messages.
/cleanviews Removes all custom views and restores default views.
/nopreview Starts Outlook with the Reading Pane turned off.
/profiles Open the Choose Profile dialog box.
/resetfolders Restores missing folders for the default delivery location.
/resetnavpane Clears and regenerates the Navigation Pane.
/resetsharedfolders Removes all shared folders from the Navigation Pane.
/resettodobar Clears and regenerates the To-Do Bar task list.
/restore Attempts to open the same profile and folders that were open prior to an abnormal Outlook shutdown.
/safe Starts Outlook with all extensions turned off and without Reading Pane or toolbar customizations.