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, we recommend Outlook be closed before using the following steps.

Windows Vista/7:

1. From the Windows 7 operating system, Click Start.

2. Navigate to and Click All Programs.

3. Within All Programs, locate Accessories and choose Run.

4. Witihn the Run dialoge box, enter the following into the run field (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

5. Click OK.

Windows 8

1. a. Swipe up to show the Apps screen. If you are using a mouse, click the down arrow icon at the bottom of the screen.

    b. Press WIN and X together on the keyboard and select Run.

    c. Right-Click on the Start menu.

2. On the Apps screen, swipe or scroll to the right and locate the Windows System section heading.

3. Under Windows System, press or click on Command Prompt.

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

"c:\program files\microsoft office\office15\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\office15\outlook.exe" /commandswitch

Recommended command switches

/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.
/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.
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.