Click start > run> insert run command > hit OK
/cleanautocompletecache
Removes all names from the AutoComplete list
e-mail addresses from the AutoComplete list
Work with Version – 2010
/cleancategories
Deletes any custom category names that you have created.
Restores categories to the default names.
Work with Version – 2007,
Work with Version – 2010
/cleanclientrules
Deletes client-based rules.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/cleanprofile
Removes invalid profile keys and recreates default registry keys where applicable.
Work with Version – 2003,
Work with Version – 2007
/cleanpst
Launches Outlook with a clean Personal Folders file (.pst)
Work with Version – 2003
/cleanreminders
Clears and regenerates reminders.
Work with Version – 2000,
Work with Version – 2002/XP,
Work with Version – 2003, Work
with Version – 2007,
Work with Version – 2010
/cleanroamedprefs
All previous roamed preferences are deleted and copied again from the local settings on the computer where this switch is used. This includes the roaming settings for reminders, free/busy grid, working hours, calendar publishing, and RSS rules.
Work with Version – 2007,
Work with Version – 2010
/cleanrules
Starts Outlook and deletes client- and server-based rules.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/cleanserverrules
Starts Outlook and deletes server-based rules.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/cleansharing
Removes all RSS, Internet Calendar, and SharePoint subscriptions from Account Settings, but leaves all the previously downloaded content on computer. This is useful if you cannot delete one of these subscriptions within Outlook
Work with Version – 2010
/cleansniff
Deletes duplicate reminder messages
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/cleansubscriptions
Deletes the subscription messages and properties for subscription features.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/nocustomize
Starts Outlook without loading outcmd.dat (customized toolbars) and *.fav file.
Work with Version – 2003,
Work with Version – 2007
/noextensions
Starts Outlook with extensions turned off, but listed in the Add-In Manager.
Work with Version – 2003,
Work with Version – 2007
/nopollmail
Starts Outlook without checking mail at startup.
Work with Version – 2003
/nopreview
Starts Outlook with the Reading Pane off and removes the option from the View menu.
Work with Version – 2000,
Work with Version – 2002/XP,
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/regserver
Rewrites all Outlook specific registry keys and re-associates file extensions without having to reinstall Outlook or run setup with the /y switch. The settings are stored in the Outlook.srg file located in the same folder as the Outlook program.
Work with Version – 2000,
Work with Version – 2002/XP
/resetfoldernames
Resets default folder names (such as Inbox or Sent Items) to default names in the current Office user interface language. For example, if you first connect to your mailbox Outlook using a Spanish user interface, the Spanish default folder names cannot be renamed. To change the default folder names to another language such as Japanese or English, you can use this switch to reset the default folder names after changing the user interface language or installing a different language Work with Version of Outlook.
Work with Version – 2002/XP,
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/resetfolders
Restores missing folders for the default delivery location.
Work with Version – 2000,
Work with Version – 2002/XP,
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/resetoutlookbar
Rebuilds the Outlook Bar.
Work with Version – 2000,
Work with Version – 2002/XP
/resetnavpane
Clears and regenerates the Navigation Pane for the current profile.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/safe
Starts Outlook without extensions, Reading Pane, or toolbar customization.
Work with Version – 2000,
Work with Version – 2002/XP,
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/safe:1
Starts Outlook with the Reading Pane off.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/safe:2
Starts Outlook without checking mail at startup.
Work with Version – 2003
/safe:3
Starts Outlook with extensions turned off, but listed in the Add-In Manager.
Work with Version – 2003,
Work with Version – 2007,
Work with Version – 2010
/safe:4
Starts Outlook without loading Outcmd.dat (customized toolbars) and *.fav file.
Work with Version – 2003,
Work with Version – 2007
