last time I checked, Office applications are licensed by desktop. What this means is that if you’ve got an Office Excel 2003 license (for example) for a local installation of Excel 2003 on your PC, then any other Office Excel 2003 that starts up on your desktop (whether via Citrix, Terminal Server, etc) is already licensed.
This also means that if multiple people share a PC (e.g. shift work) you only need one license for the desktop, not one each for each user.
Another example – if you’ve got one Excel license within your org only for your PC, but you run excel via multiple remote Terminal Servers/Citrix Servers, you don’t need multiple excel licenses for those servers, as long as Excel is only displayed on your desktop. This obviously stops you using things like smooth roaming, because that will require the Excel program to move from desktop to desktop.
Note that this only applies if you access Excel from outside your organization – these licenses only apply within your organization.
Now if we were talking about 2007 that would be a different story:
Did you know – with the release of Office 2007, only Volume Licensing, Work at home and Home Use Program Office can be used on a TS, OEM and FPP are not permitted for use on a TS environment
Did you know – The 1 Office license covers local install on the licensed device AND access to the Office on the TS
Did you know – If you have purchased OEM Office <90days ago, and now need to deploy over TS, attach SA giving them the same rights as volume licensing and permitting use on a TS
OEM Office is not permitted for use on a TS environment this is prohibited in the EULA
Office 2007 ULTIMATE FPP can be used on a TS environment, FPP prior to Office 2007 CAN be used on a TS environment