You have to give Folder Visable permission to them at the Top of your
mailbox. After doing that, the user needs to setup your account on
their mail profile. They will go to Tools, Email Accounts, View or
change existing email accounts, click next. The Microsoft Exchange
Server should be highlighted, click Change. Click More Settings, Click
the Advanced tab. Click "Add" and type your name and click OK. Now you
should see your name under the "Open these additional mailboxes". Don't
worry, they will only be able to see what you gave them permissions to
see. Click OK, Next, Finish.

Now they need to open their Folder List (this is the icon that looks
like a Folder under the list of Mail). You should see your mailbox
Folder listed. If not, callapse (-) the user's mailbox folder. Then you
should see their mailbox, your mailbox and Public Folders. Click the +
in front of your Mailbox to expand it.

I hope this helps.

Courtney