General Engine Configuration has two sections, Engine Ping and Shared DDC, as shown on the image above:
Engine Timeout (seconds): Defines the period you specified for Engine timeout
Engine Ping Interval (seconds): Defines the length of time the ReealityHub waits between ping packets
Shared DDC (Derived Data Cache) is a network drive that all Engines can read/write derived data. RealityHub allows you to define which storage your Engines will use for derived data cache by defining a UNC Path. It can log in to the Shared DDC network through your Username and Password.
Enabled: When you activate the Enabled checkbox, your Engines reaches your Shared DDC and can read/write.
Path: Area for defining the UNC Path for Shared DDC.
Username and Password: Administrative credentials of the computer your Derived Data Cache is located
Please keep that in mind; the Path you define must be a UNC Path.
Your Engines must have administrative rights to reach the Shared DDC.
For more details about Shared DDC, please visit: https://docs.unrealengine.com/4.27/en-US/ProductionPipelines/DerivedDataCache/
Next step: MOS Module Configuration