The Community folder of your Microsoft Flight Simulator installation is the path where mods such as scenery add-ons and liveries are installed. The installation method for these addons is often referred to as 'drag and drop' installation, as you need to drag the contents of the downloaded archives into this path. However, locating the Community folder often can be a mess, since the path is different depending which platform you were using to install Microsoft Flight Simulator.
Microsoft Store Version
C:\Users\USERNAME\AppData\Local\Packages\Microsoft.FlightSimulator_RANDOM\LocalCache\Packages\Community
Steam Version
C:\Users\USERNAME\AppData\Roaming\Microsoft Flight Simulator\Packages\Community
Finding your AppData folder
If AppData folder is not showing up in your Windows Explorer, type %AppData% or %LocalAppData% in Windows search bar and press enter to open your AppData folder.
Alternative Solutions
You may have selected a custom location to install Microsoft Flight Simulator on your drive during installation progress. In this case, you need to locate the path you chosed to install MSFS on. You can use the in-game developer tools to do so.
Open the game settings > General
Navigate to Developer Tools and switch them to ON.
On the developers menu at top, navigate to Tools > Virtual File System
The path of your Community folder is under > Watched Bases.
Video Tutorials