Sometimes it’s good to have a reference log in case that an installation goes wrong or takes unusually long. I therefore keep the relevant logs of the updates in my test lab for a while. This is for a CAS with one Primary.
In larger environments, the installation may of course take considerably longer than the one below.
Checklist for installing update 2002 for Configuration Manager: https://docs.microsoft.com/en-us/configmgr/core/servers/manage/checklist-for-installing-update-2002
Update 2002 for Microsoft Endpoint Configuration Manager current branch is now available: https://techcommunity.microsoft.com/t5/configuration-manager-blog/update-2002-for-microsoft-endpoint-configuration-manager-current/ba-p/1272670
What’s new in version 2002 of Configuration Manager current branch: https://docs.microsoft.com/en-us/configmgr/core/plan-design/changes/whats-new-in-version-2002