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Message: <blockquote data-quote="cwa107" data-source="post: 1624500" data-attributes="member: 24098">I had never heard of ICA as it relates to printers until this thread. It would seem that someone made the rather unfortunate choice of naming a printing protocol "ICA".  It is more commonly known as a protocol for Citrix XenApp / XenDesktop, which is a virtualization technology, widely used throughout the industry.This is why you're seeing its relation to "servers" in your research - because ICA is the lifeblood of a major enterprise technology.TWAIN is a rather old communication protocol for scanners.  Most scanners support TWAIN and the drivers tend to be fairly generic.  I believe that opting for that choice is the correct one.  I hope it works out for you.</blockquote>