MECM - Windows 11 Readiness Dashboard
You can use MECM's built-in Windows 11 Readiness Dashboard to help determine whether your Windows PCs are able to upgrade to Windows 11. This dashboard will give you information about whether your computers meet certain hardware/software requirements for upgrade. In the MECM console, browse to Software Library -> Overview -> Windows 11 Upgrade Readiness. You can narrow down the results of the dashboard to a particular set of computers by clicking the Browse button and then selecting the collection you'd like to view.
The dashboard presents a breakdown of your computers by operating system and feature update level. Additionally, the computers will be broken down by those that meet the system requirements for Windows 11 and those that do not.
Clicking the red "Cannot Upgrade" part of the ring in the Upgrade Experience indicators will give you a list of the computers that do not meet the requirements along with a description of the reason of why the computer does not meet the requirements e.g. CPU, TPM, Secure Boot. In some cases you may be able to switch from TPM 1.2 to TPM 2.0 and/or simply enable UEFI boot mode. However, in most cases, the computer will need to be replaced with newer hardware.