Auto-link will only trigger an IPS/Application Control update if the signatures used in the Policy Package require a newer version 7.4.2

This information is also available in the FortiManager 7.4 Administration Guide: Adding offline model devices

Auto-link will only trigger an IPS/Application Control update if the signatures used in the Policy Package require a newer version.

• This feature can be observed from System Settings > Task Monitor. This feature adds a new check before pushing a configuration to FortiGate from FortiManager. If the check determines that the FortiGate IPS/Application database is older than FortiManager's, FortiManager will send an update-now request to FortiGate to update the database to the latest.
  
• If there is no need to update the FortiGate database, the check will display a statement in the Task Monitor.
  
• If the update fails (15 minute timer expires), FortiManager will move forward to push the configuration to FortiGate.