• Step 1. Log in to the DirectAdmin control panel.

• Step 2. Navigate to the "Subdomain Management" page from the "Account Manager" subsection.

• Step 3. Click the "Add Subdomain" button.

• Step 4. Enter the subdomain you want to use without including the already existing primary domain.

• Step 5. Click the "Add Subdomain" button.

Now the subdomain will be added to your virtual host file and DNS zones.