From August 19th 2020, SECTIGO issues SSL certificates with a maximum lifetime of 398 days (13 months) as specified by CA/Browser consortium. SSL certificates with a longer lifetime must be re-issued annually (free of charge). You'll receive reminders via e-mail. SSL certificates issued before August 19th 2020 remain valid until their planned expiry date. Code Signing & S/MIME certificates are not affected and remain valid until their planned expiry date.

What is the difference between Single-Domain and a Wildcard certificate?

A Single-Domain certifiacte only works for exactly one domain. For example, a single domain certifiacte www.mycompany.com will only work for exactly this address (including all subpages e.g. www.mycompany.com/products). However this kind of certificate will not be working for a different subdomain e.g. products.mycompany.com - For this domain you will have to purchase a separate SSL certificate. 

Alternative: For supporting multiple subdomains you can also simply purchase a wildcard certificate. - A Wildcard certificate will work on ALL subdomains. If you purchase a wildcard certificate for e.g. *.mycompany.com, it will be working for www.mycompany.com as well as forproducts.mycompany.com as well as for any other possible subdomain, e.g. news.mycompany.com, etc.

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