Is there is a way to export a single rule from MonitoringPolicies.xml file located on the Foglight Management Server SupportBundle and import it from the UI (User Interface)?
This is a way you can extract a single rule from MonitoringPolicies.xml file, located on the FMS Support Bundle, add it to a cartridge created using Cartridge builder and then import it using Cartridge Inventory:
1. Generate one support_bundle_management_server. Extract the Support Bundle and open MonitoringPolicies.xml, then locate the rule you need. This is one example(This is an extracted part of the whole rule):

2. Create a separate txt file, and paste the rule information you obtained from MonitoringPolicies.xml on this new file and then add the following bold lines at the beginning and at the end:

3. Save the file as rule.xml; at this point it is possible to import the rules on the new server by using the Foglight command line interface:
$FMS_HOME\bin\fglcmd -srv server_name -usr foglight -pwd foglight -cmd util:configimport -f C:\rule.xml
4. Or if you want to import it from Foglight User Interface, please open Export_Import_Rules-1_0_0.car using a decompressing application such as 7zip, go to path \Export_Import_Rules-1_0_0\rules-1_0_0\ and then replace rule.xml with the file created on the previous step.
5. Go to Administration │ Cartridges │ Cartridge Inventory, click on "Install Cartridge", locate the cartridge and install it.
6. Go to Administration │ Management Server │ Rules & Notifications │ Rules, choose "All Cartridges" and verify that the rule has been successfully installed.
Note: Open attachment Export_Import_Rules-1_0_0.xml and look for rules.xml file to get the extra rule code you need to add to the extracted rule.
Note: Export and import of rules can also be completed entirely via the cartridge builder