This feature is exclusive to PLATINUM accounts. If you are a BASIC or PREMIUM user and wish to take advantage of this feature, please upgrade.
To activate the Multi-Account management option, click on your account avatar in the top right-hand corner to access the navigation menu:
Select the Multi-accounts section.
Then click the blue "ENABLE THIS FEATURE" button.
Confirm by checking the Terms box and validate clicking the green "Yes! Enable the feature" button.
You can now add your first Managed Account!