1) Macros are in the VBAProject.OTM File, which you can edit by pressing Alt+F11 in Outlook to open the VBA environment.
2) You might need to add it again with View | Toolbars | Customize.

Signature
Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> I had a macro in OL2000 for adding senders to the adult senders list; the
> button which activated this has disappeared suddenly from my toolbar. So,
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>
> TIA