1. In Outlook, on the Tools menu, click Options, and then click Calendar Options.
2. Click Free/Busy Options.
3. To specify how many months of free/busy data is available on the server, enter a number in the Publish [x] month(s) of Calendar free/busy information on the server box. You can publish up to 36 months of free/busy schedule information.
4. To specify how often Outlook automatically updates your free/busy information on the server, enter a number in the Update free/busy information on the server every [x] minutes box.
5. Select the Publish at my location check box, and then type the name of the server where your free/busy information is stored. The name you specify can include FTP, HTTP, or file URLs; for example, ...computername/public/name.vfb. The file extension for free/busy files is .vfb.

Note  To see the free/busy times of someone else who publishes schedule information to an intranet or Internet location, make sure you have the location specified in Outlook. In the Free/Busy Options dialog box, in the Search location box, type the full path to the location you would like to search for free/busy information. You can use any valid URL format, such as: http://or ftp://.

If most of the people you schedule meetings with are storing their free/busy information in the same location, specify a default path using the %NAME% and %SERVER% substitutions to find any of their vfb files. For example, type ftp://%SERVER%/fb/%NAME%.vfb. When you send a meeting request, Outlook replaces %NAME% and %SERVER% with the name and server of the person you are sending the request to; for example, ftp://microsoft.com/fb/JeffreyWeems.vfb.