[German]As expected, Microsoft has released both Windows 10 version 2004 and Windows Server 2004 for general use in the late evening of 27 May 2020.
The announcement by Microsoft
For example, the general availability information can be found on the status page for Windows 10, version 2004 and Windows Server, version 2004.
In this article, Microsoft then confirms that no automatic update is performed despite general availability. Initially, the upgrade will only be offered on systems running Windows 10 version 1903 and version 1909. And even there, users will have to go to Windows Update in the settings page under Update and Security and then click the Check for Update button. Then the update client will start searching for the feature update.
Then an entry Feature update for Windows 10 Version 2004 should be shown under Optional Updates available. The user can then click a hyperlink to download and install the feature update.
But note the German comment from Martin – who says, that his test with Windows 1903/1909 resulted, that Windows 10 install a feature update immediately, if Feature Updates are deferred a few days and this period is reached.
Are you not offered a function update? As long as no update delay is set, this is intended by Microsoft. Microsoft writes here, that the distribution of the new Windows version will only be done on selected systems, even if a search is done. For example, I am not offered anything yet. But Microsoft wants to extend the distribution step by step to more systems in the coming weeks. And if you are in a hurry, you can use the download tool (see Windows 10 Version 2004 will be released on May 27, 2020).
Just wait, there are too many bugs
Even though Windows 10 version 2004 is now released, upgrading is a bad idea. On the Windows 10 version 2004 status page, there is currently a list of ten confirmed bugs that Microsoft is investigating. I also have other reports (like in this German article and in the comments) about bugs.
Windows 10 V2004 is ready, rollout for Insider
Windows 10 Insider Preview Build 19041.264 as new RTM.
Windows 10 Version 2004 release between 26th & 28th May
Windows 10 Mai 2020 Update released at MSDN & for OEM
Refreshed Windows 10 V2004 ISOs released on MSDN/MVS
Windows 10 V2004: Microsoft started to add 20H2 features
No more 32-bit Windows 10 from V2004 on new devices
Windows 10 Version 2004 will be released on May 27, 2020