From the
docs on Code With Me:
"In IntelliJ IDEA 2021.1 and later, the Code With Me plugin is enabled by default and doesn't require manual installation."
"If you have the IntelliJ IDEA Community edition, you have also Community version of Code With Me license included in it.
Community and Ultimate editions of Code With Me license differ with the number of guests that is allowed and time limits of the Code With Me session."
"There are several scenarios in which you might need to activate the Code With Me license manually:" (see linked page for details)