Joseph asked a question about the Location field on appointments and meeting requests:
"I set up an internal office meeting and there is an arrow for selecting the Location of the meeting. Now this may seem simple to most people, but a little confusing to me. How do I add our office conference rooms to the Location pull down?"
You add the conference rooms by typing them in. :) The field is not populated from server resources (but it would be great if it did!), you need to type the location in the field. The 10 most recently used locations are remembered in the list, so if you use a limited number of locations you can just select from the list.
To remove locations from the list you need to edit the registry and delete the entire list. Or type up to 10 more locations to replace the ones on the list. (You need to save the appointment to register the location on the MRU.)
The key you need to delete is
HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\Preferences\LocationMRU
Where xx = your version of Outlook.
Outlook 2010 = 14.0
Outlook 2007 = 12.0
Outlook 2003 = 11.0
Outlook 2002 = 10.0
If you prefer not to edit the registry, you can download a reg file that will delete it for you from Clear the Location drop-down list on Outlook appointments.
Published August 24, 2011. Last updated on May 3, 2017.