What will be the result of reverting to a previous revision version in the revision...

Option C: It will modify the device-level database.This is correct. Reverting to a previous revision version in the revision history affects the device-level database by restoring it to the state saved in the selected revision. This ensures that any changes made after the selected revision are discarded, and the device configuration is returned to the earlier state.

Explanation of Incorrect Options:

Option A: It will install configuration changes to managed devices automaticallyis incorrect because reverting a revision does not automatically push changes to the devices; it merely reverts the configuration on the FortiManager.

Option B: It will tag the device settings status as Auto-Updateis incorrect because "Auto-Update" is not a status related to the revision history mechanism.

Option D: It will generate a new version ID and remove all other revision history versionsis incorrect as reverting to a previous revision does not delete all other versions; it creates a new revision point for tracking.

FortiManager References:

Refer to the "Revision Management" section in the FortiManager Administration Guide, which provides an overview of how revisions are managed and utilized for restoring configurations.