Latest Update: November 06, 2020

Windows 10 20H2 is again a small fall release with a long support cycle of 30 months. It shares a lot with the spring release (NTK 2004) so check out my list for this release, too.
If you found something new before me or if I missed anything important, please send me a message via Twitter.

General

Topic Link Source
What’s new for IT Pros New and Updated Features of interest for IT Pros Microsoft
What’s new What’s new in Windows 10, version 2004 Microsoft
Release Status Known issues and notifications Microsoft
Removed features Features and functionality removed in Windows 10 Microsoft
Connection Endpoints Manage connection endpoints for Windows 10 Enterprise, version 20H2 Microsoft

Group Policies

Topic Link Source
WMI Filter Select Version,ProductType from Win32_OperatingSystem WHERE Version LIKE "10.0.19042%" and ProductType = "1" Sascha Stumpler
ADMX ADMX files for 20H2 Microsoft
Baseline (DRAFT) Security Baseline (DRAFT) for Windows 10 20H2 Microsoft
Baseline Download Not-Here-Yet Security Compliance Toolkit Microsoft

Autopilot, OSD, MEMCM, Intune and MDT

Topic Link Source
MDM What’s new in mobile device enrollment and management Microsoft
MDM-CSP Policy CSP – LocalUsersAndGroups Microsoft
LCU+SSU Combined Servicing Stack and Cumulative Updates Microsoft

Misc

Topic Link Source
Important Issues Knowledgebase: Important Issues for Windows 10, version 20H2 build 19042 DirTeam, Sander Berkouwer
MMC error After updating to Windows 10, version 20H2, you might receive an error when accessing the sign-in options or users MMC snap-in Microsoft