Cisco ASDM is capable of managing a single ASA. But the same shortcut can be used to connect to multiple ASAs.
“When you run Cisco ASDM as a local application, it connects to your security appliance from your desktop using SSL. Running Cisco ASDM as an application has these advantages:
- You can invoke ASDM from a desktop shortcut. No browser is required.
- One desktop shortcut allows you to connect to multiple security appliances.” (These are independent sessions, policy sharing is not possible.)