The Internet Printing Protocol (IPP) or IPPS for the secure version defines a standard protocol for printing and related functions such as print queues, media size, resolution, etc.
Like all IP-based protocols, IPP can be used locally or over the Internet to printers thousands of miles away. However, unlike other protocols, IPP supports access controls such as authentication and encryption, making it more secure than older solutions. (Source: Wikipedia)
The Watchdoc Print Client for Chrome module is based on this protocol: devices must support the IPP protocol to be compatible with this solution.
It is sometimes necessary to configure the printing devices beforehand to activate this protocol:
Kyocera WES: activate SSL and IPPS
Xerox WES on Altalink or Versalink models: activate IPPS
This protocol must be configured on the print queue in the Spool File Send section (see Configuring a print queue) or, under the Protocol setting if the queue is created in the Supervision Console (see Creating a queue).
Note that a specific procedure is required to enable IPP printing on workstations running Mac® OS.