Troubleshooting Tip: Resolving interface mapping errors when importing firewall configuration from FortiGate to FortiManager

To resolve the interface mapping error, follow these steps:

1. On FortiManager GUI -> Device manager -> Device & Groups -> Select the FortiGate -> Dashboard: Summary -> Configuration and Installation -> Select Revision History Icon (Highlighted in the screenshot below):
   
    
    

                                                                  

2. Perform a Retrieve Config operation to ensure the latest configuration is retrieved from the FortiGate device.
3. Verify the interface mapping and address objects to ensure they are correctly configured.
4. If any issues are found, modify the objects/settings from the FortiManager to correct them.
5. Use the Install Wizard to push the policy package back to the FortiGate device and check the install preview to ensure no abnormal changes are made.

Additionally, consider creating a new ADOM with the same version as the FortiGate device and importing the configuration to the new ADOM to resolve any version compatibility issues.