Outlook doesn't have any feature to do that.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I want to link 2 or more appointments, eg a meeting, and travel time before
> and after, so that if I move or change the length of the meeting, the
> travel
> times move accordingly. Any clues?