To licence a new server, you must have an unactivated licence.
To procure a new licence, sign-in to your dashboard and select "Purchase New Licence":
Select the number of seats (in multiple of 10) you wish to buy:
Select the currency you wish to be charged in:
If you are an academic or non-profit institution you may be issued a coupon to receive a discount.
Select a payment method. This will be a credit / debit card unless you have contacted Simul Documents and agreed to receive invoices:
Enter your billing details including your name and address and press "Create". You will be billed for the annual subscription.
Your licence will be active immediately and expire 1 year from purchase.
You can then download the licence file to activate it as described here.