- On the Virtual Datacenters dashboard screen, click the card of the virtual data center you want to explore, and under Networking, select Security.
 - Select a security service, and click Configure services.
 - Click the Security Tags tab.
 - From the list of security tags, select the security tag that you want to edit.
 - Click the Edit button.

 - Edit the name and the description of the security tag.
 - Assign the tag to or remove the assignment from the virtual machines that you select.
 - To save your changes, click Keep.
 
If you edit a security tag, you might also need to edit an associated security group or firewall rules.