In Citrix License Server open Citrix Licensing Manager, open settings, in Share usage statistics with Citrix -> Do not send any data to Citrix -> Save.
In new versions, there is no “Do not send any data to Citrix” checkbox
https://support.citrix.com/article/CTX220679
Open Citrix.opt file under MyFiles, change #CITRIX CEIP ANON > CITRIX CEIP NONE (Delete hashtag)