Hi CherishR,
Are you talking about
Zimbra? The software Desktop support that Yahoo just purchased? Other than that, yahoo does not have a way to connect to someone else's computer, from what I have just researched through Google.
Andrea~
Excerpt from Zimbra:
Extra features with Zimbra Collaboration Suite
* Email, contacts, calendar, documents, tasks synchronize to the Zimbra Server
* Access to shared data from peers (email, contacts, calendars, etc)
* Works with both Open Source and Network Edition (ZCS 5.0+ servers)
* Existing user preferences (folders, signatures, settings, etc) are imported
* Access to mobile devices, the Zimbra online Web Client and much more