I have been searching all over for a solution and process but have been unable to find one. We are a small company but am finding that I still have a need for the ISA Server. Thanks!

Yes it is possible. here's some info i found on it. Version Upgrade (from SBS 2003 Standard Edition to SBS 2003 R2 Standard Edition) $299 T72-01415 Version Upgrade* (from SBS versions 4.0, 4.5, 2000, or 2003 Premium to Windows Small Business Server 2003 R2 Premium Edition) $699 T75-01256 Product Upgrade (from SBS 2003 R2 Standard to SBS 2003 R2 Premium) $699 T75-01260 So this is confusing. i thinkwe need to T72-01415 and T75-01260. I'm in the same situation as you but instead if ISA i need SQL 2005 here is the link. Hopefully someone from MS will confirm this for us. http://www.microsoft.com/windowsserver2003/sbs/howtobuy/pricing.mspx