Multi-Domain SSL Certificates (SAN/UCC)

A SAN SSL certificate (Subject Alternative Names) covers multiple domains and subdomains with a single certificate. Ideal for Exchange Server, Microsoft 365 hybrid, and organisations with many domains.

What is SAN SSL?

SAN certificates can include up to 250 unique domain names:

✓ www.company.com
✓ mail.company.com
✓ outlook.company.com
✓ company.dk
✓ company.se
✓ login.company.com
✓ ... and many more

Unlike Wildcard certificates, SAN certificates can cover completely different domains (e.g. company.com and company.dk).

Typical use cases

Exchange Server

Exchange requires up to 3–5 domain names to function correctly:

mail.company.com
autodiscover.company.com
outlook.company.com
company.com

A SAN certificate is the standard solution for Exchange.

Microsoft 365 Hybrid

Hybrid Exchange setups require certificates with specific SAN names. FairSSL can help you identify the correct names.

Multi-site hosting

Hosting websites for multiple customers on one server? A SAN certificate can cover them all.

SAN vs. Wildcard

	SAN	Wildcard
Covers	Up to 250 specific names	All subdomains (one level)
Different domains	✓	✗
Price	Base price + per extra name	Fixed price
Exchange Server	Ideal	Possible
Validation	DV, OV or EV	DV or OV