You can follow the same instructions as listed for for v1.9.x to v2.0.x with some notable exceptions.
2.1.4 and above will also ensure that there is an account for the
ACMEv2 server, so that an initial manual renewal is no longer required.
For fully unattended upgrades, you will therefor have to specify
--import --emailaddress firstname.lastname@example.org --accepttos on the command line so
that the account can be created without additional user input.
Version 2.1.0 is an xcopy update for “standard” users, but those who customized the program to fit their
settings.config, custom plugins or custom Serilog configuration will have to re-apply some of
serilog.json. More details are available here.