An administrator has enabled Service Access on FortiManager.

Option B: It allows FortiManager to respond to requests for FortiGuard services from FortiGate devices.This is the correct answer. When Service Access is enabled on FortiManager, it allows FortiManager to act as a local FortiGuard server for the managed FortiGate devices. This enables the FortiManager to respond to requests for FortiGuard services, such as updates for antivirus, web filtering, and other security services.

Explanation of Incorrect Options:

Option A: It allows administrative access to FortiManageris incorrect because Service Access is specifically for FortiGuard service communication, not for administrative access.

Option C: It allows third-party applications to gain read/write access to FortiManageris incorrect because Service Access does not provide API or third-party access capabilities.

Option D: It allows FortiManager to determine the connection status of managed devicesis incorrect because Service Access does not directly manage or check connectivity status of devices; it is used for FortiGuard service requests.

FortiManager References:

Refer to the "FortiManager Administration Guide," particularly the sections on "Service Access Settings" and "FortiGuard Services."