A search if the KB produced these results:
180764 - OL98: Creating Sequentially-Numbered Items in a Folder
This article provides an overview of possible solutions for
sequentially numbering items in a Microsoft Outlook folder. Outlook
does not provide a direct way of automatically incrementing a field
value.
http://support.microsoft.com/default.aspx?scid=kb;en-us;180764
172796 - OL97: Creating Sequentially-Numbered Items in a Folder
This article provides an overview of possible solutions for
sequentially numbering items in an Microsoft Outlook folder 97. Outlook
does not provide a direct way of automatically incrementing a field
value.
http://support.microsoft.com/default.aspx?scid=kb;en-us;172796
201093 - OL2000: Creating Sequentially-Numbered Items in a Folder
This article provides an overview of possible solutions for
sequentially numbering items in a Microsoft Outlook folder. Outlook
does not provide a direct way of automatically incrementing a field
value.
http://support.microsoft.com/default.aspx?scid=kb;en-us;201093
There were more in the troubleshooting section.
Hollis D. Paul [MVP - Outlook]
(e-mail address removed)
Using Virtual Access 4.52 build 277 (32-bit), Windows 2000 build 2195
http://search.support.microsoft.com/kb/c.asp?FR=0&SD=TECH&LN=EN-US
Mukilteo, WA USA