When you contact our Support Team via Service Desk, you need to identify your subscription by the EN - Entitlement Number as follows:
If you are subscribing to a Free account, you can find your EN under your profile(Go to your avatar and clickMy Profile):
If you are subscribing to a paid account, you can find your EN in the About Workspace (click thegearicon in the top-right corner) of the Shared Workspace of that account: