SEP Licensing

Hi all.

I have the following scenario:

1 MS Terminal Server + Citrix XenApp

20 MSTS CAL

20 Citrix User License

10 Desktop (with a different AV from a different vendor)

5 Desktop with no AV

5 Thin Client

Which is the correct licensing SEP solution?

Solution 1

1 SEP License for the MSTS / Citrix XenApp Server

5 SEP licenses for the 5 desktops with no AV

Solution 2

1 SEP License for the MSTS / Citrix XenApp Server

20 SEP License, one for each user accessing the MSTS / Citrix XenApp server.
     This 20 licenses cover the 5 desktops with no AV

Solution 3

1 SEP License for the MSTS / Citrix XenApp Server

20 SEP License, one for each user accessing the MSTS / Citrix XenApp server

5 SEP licenses for the 5 desktops with no AV

Other solution?

Thanks

Enrico