[THIN] older ICA clients on WI 5.0?

I need to upgrade the Web Interface servers from version 4.0 to 5.0. However, I found some clients out there that are running an older version of the ICA client (7.100.21825). Does anyone know if this older version should work on v5.0 Web Interface?

My quick test showed me that it may not since launching a ICA session did nothing from one of these clients.

Thanks in advance!

--
Gary
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