This will depend on the use case. Licenses in general apply to the end product you use them for. Typically, this end product will be a website focused on a specific topic. If you use subdomains where the topic of the site is not identical or the general design is different, then these subdomains represent their own end products. Thus, you will need one license per subdomain.
Only in cases where the topic and general design of your subdomains match the purpose of your main site, it is fine to go with one license. In the latter case, you can contact us, and after review, we can enable your license for usage with subdomains.
Scenarios
Multiple sub-domains as multiple end products
Suppose you create a website that presents different branches of your business in various cities or countries. Thus, you create two different subdomains: brancha.my-business.com and branchb.my-business.com. If the purpose of each of the subdomain sites is a bit different or the general design is different, you have created different end products. So, in this case, you need one license per subdomain.
Suppose you create a website for a retailer of apples and a retailer of pears, both hosted on your main domain. Thus, you create two different sub-domains: apple-retailer.my-grocery-hosting.com and pear-retailer.my-grocery-hosting.com. Your end products here clearly are the websites for each of the merchants, so in this case, you need one license per subdomain.
Multiple sub-domains in one end product
Suppose you create a website that showcases the various departments of a local company. Thus, you create two different sub-domains: sales.my-business.com and customercare.my-business.com. If the departments are presented in a way that uses the same general design as your main site, they count towards a single end product. So in this case, you don’t need extra licenses per subdomain.
Suppose you create a website for a grocery store, and among other goods, you sell apples and pears. To show your supplies, you create two different subdomains: apples.my-grocery-store.com and pears.my-grocery-store.com. Your end product clearly is the website for the grocery store, so you only need one license.
