mIRC added built-in SASL support in version 7.48, released April 2017. The below instructions were written for version 7.51, released September 2017. Earlier versions of mIRC have unofficial third-party support for SASL, which is not documented here. Libera.Chat strongly recommends using the latest available version of your IRC client so that you are up-to-date with security fixes.
Login Methoddropdown, select
Passwordbox at the bottom of the window, enter your Authserv username, then a colon, then your Authserv password. For example,
Based on content © 2016-2021 freenode/web7.0’s contributors under Creative Commons BY-NC-SA