{"id":300,"date":"2019-07-18T20:28:30","date_gmt":"2019-07-18T20:28:30","guid":{"rendered":"https:\/\/www.rapidsslonline.com\/ssl\/?p=300"},"modified":"2021-09-30T08:27:55","modified_gmt":"2021-09-30T08:27:55","slug":"what-is-standard-ucc-ssl","status":"publish","type":"post","link":"https:\/\/www.rapidsslonline.com\/ssl\/what-is-standard-ucc-ssl\/","title":{"rendered":"What is Standard UCC SSL and How Does It Protect Multiple Domains?"},"content":{"rendered":"\n

What to know about the type of SSL certificate that protects multiple\ndomains on multiple servers<\/h2>\n\n\n\n

Unified communication certificates<\/a>, or UCCs, are one of the most misunderstood certificate types in the SSL industry. Frankly, a standard UCC SSL certificate is a regular point of confusion. So, we\u2019ve written this brief guide to help demystify the acronym a bit for our customers.<\/p>\n\n\n\n

UCC certificates are basically multi-domain\/SAN certificates that have been specifically designed for Microsoft Exchange and Office Communications servers<\/a>. Nowadays, more modern versions of those servers play nicely with other SSL certificates. But, originally, they were fairly finicky and required their own iteration of an SSL certificate. Hence, the creation of UCCs. A unified communication certificate (UCC) can secure up to 250 different domains, provided they\u2019re hosted on one of those two server types. UCC can actually be used on multiple servers at once, too. They just need to be Exchange or Office Communications servers.<\/p>\n\n\n\n

How to Get a Standard UCC SSL Certificate Issued<\/h2>\n\n\n\n

You get a standard UCC SSL certificate issued just like you\nwould a multi-domain certificate: You list your main domain as the fully-qualified\ndomain name (FQDN), and each additional domain goes in the Subject Alternative\nName (SAN) field. This can be done for up to 250. Most UCCs come packaged with two\nto four SANs, with additional for purchase as needed. <\/p>\n\n\n\n

Once the certificate authority (CA) performs validation,\nwhich will include a domain control check on each listed domain, it issues the\ncertificate. This can be installed on as many servers as you need. Keep in mind:\nAll of these domains will be using the same standard UCC SSL certificate, which\nalso means using the same public and private key pair. This means it would be\nwise to rotate keys regularly or to use multiple, concurrent private keys to\nlimit their exposure and the risk that entails.<\/p>\n\n\n\n

One of the least known aspects of the UCC is that it can also function as a multi-domain wildcard, securing additional domains and associated sub-domains at a single level<\/em> of the URL. This makes them especially versatile, but also explains why you can\u2019t get an extended validation (EV) UCC if you use wildcard SANs. Let\u2019s just say the Certificate Authority\/Browser Forum (CA\/B Forum) not only frown upon but outright prohibit the issuance of EV wildcard SSL certificates<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

What to know about the type of SSL certificate that protects multiple domains on multiple servers Unified communication certificates, or UCCs, are one of the most misunderstood certificate types in<\/p>\n

Read More<\/a><\/p>\n
\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,13],"tags":[17],"class_list":["post-300","post","type-post","status-publish","format-standard","category-multi-domain-ssl","category-ssl-advanced","tag-ucc"],"yoast_head":"\nWhat is Standard UCC SSL and How Does It Protect Multiple Domains?<\/title>\n<meta name=\"description\" content=\"This article aims to explain unified communication certificates (UCCs) and how standard UCC SSL certificates can be used to protect multiple domains.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rapidsslonline.com\/ssl\/what-is-standard-ucc-ssl\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What 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