Citrix Systems Citrix MetaFrame Application for Windows 1.8 - Manual (Page 47)

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In addition, if you are using the ICA Win16 or Win32 clients from MetaFrame 1.0
or earlier, all sessions must use the same network protocol (TCP/IP, IPX,
NetBIOS).
Citrix servers exhaust all local (un-pooled) user counts before giving
out pooled user counts. A user assigned a local user count uses a second user
count when starting a second session on a different Citrix server.
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Use Citrix Licensing to maintain Citrix licenses. With Citrix Licensing, you can:
u Add licenses
u Activate licenses
u Adjust the pooled user license count
u Remove licenses
u View a W IN F RAME license disk
u Print unactivated licenses
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