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MULTI-DOMAIN (SAN / UCC) SSL

Multi-Domain (SAN) SSL Certificates

Multi-domain SSL certificates, also sold as SAN certificates and UCC certificates, secure up to 250 domains with a single certificate. All three names describe the same product: one SSL/TLS certificate that lists multiple hostnames in its Subject Alternative Name field and encrypts traffic for each one. Renewal SSL carries multi-domain certificates from Sectigo, DigiCert, GeoTrust, GoGetSSL, and Comodo, in DV, OV, and EV validation tiers, starting at $21.66/year for 3 domains with free reissuance during the validity period.

SAN & UCC UNIFIED STANDARD

One certificate secures multiple distinct domains (example.com, example.net, brand.org). Tailored for Microsoft Exchange, Office 365 hybrid setups, and cloud hosting.

SCALE UP TO 250 DOMAINS

Includes 3 domains by default (1 Common Name plus 2 SANs) and expands up to 250 SAN slots. Add or swap domains anytime via free reissuances.

PRODUCT CATALOG

Multi-Domain (SAN) SSL Certificates

Consolidate multiple distinct domain names into one high-efficiency certificate.

Multi-Domain

Domain Validation

Certum Commercial DV MultiDomain SSL (1 Domain)

$3,53

Multi-Domain

Domain Validation

sslTrus Multi-Domain BasicSSL

$16,80

Multi-Domain

Domain Validation

Sectigo Positive SSL Multi Domain (1 CN Single + 2 SANS Single)

Price range: $17,29 through $73,24

Multi-Domain

Domain Validation

PositiveSSL DV Mixed Multi-Domain SSL

$27,00

Multi-Domain

Domain Validation

PositiveSSL Multi-Domain (DV)

$27,00

Multi-Domain

Organization Validation

Certum Trusted OV MultiDomain SSL (1 Domain)

$33,53

PRODUCT OVERVIEW

Multi-Domain, SAN, and UCC: Same Certificate, Three Names

Three industries labeled the exact same technology from different perspectives.

TECHNICAL SPEC

Subject Alternative Name (SAN)

Comes from the X.509 extension field itself. Engineers and sysadmins use this term because it describes where additional hostnames are listed in the CSR and certificate.

• Standard X.509 extension • Holds distinct hostnames & TLDs • Used in OpenSSL & server config • Reissuance: Modify SANs anytime
MICROSOFT STANDARD

Unified Communications (UCC)

The name Microsoft promoted when multi-domain certs became standard for Exchange, OCS, Lync, and Office 365 hybrid hostnames (autodiscover, mail, webmail).

• Designed for MS Exchange & OCS • Secures autodiscover & mail FQDNs • Hybrid cloud & on-premise trust • Works identically to SAN SSL
COMMERCIAL LABEL

Multi-Domain SSL

The plain-English commercial label adopted by resellers so buyers can find the product without knowing technical X.509 or Microsoft-specific terms.

• Simplifies multi-brand management • Collapses renewal dates into one • Default 3 SANs, scalable to 250 • Saves up to 70% vs single certs
VALIDATION SPECTRUM

Validation Levels: DV, OV, and EV Multi-Domain SSL

All three tiers deliver identical 256-bit encryption; choose by identity verification depth.

RAPID DEPLOYMENT

Domain Validation (DV)

Issued in roughly 5 minutes after automated domain control check. Suited to blogs, personal projects, internal tools, and staging environments.

• Issued in ~5 minutes • Automated email, DNS, or HTTP check • From $21.66/yr for 3 domains • Best for: Dev, staging & internal tools
BUSINESS IDENTITY

Organization Validation (OV)

Issued in 1–3 business days after business verification. The certificate displays company details, satisfying PCI DSS payment compliance.

• Issued in 1–3 business days • Verified company details in cert • Satisfies PCI DSS compliance • Best for: E-commerce & corporate sites
MAXIMUM ASSURANCE

Extended Validation (EV)

Issued in 1–5 business days after strict corporate audit under CA/B Forum guidelines. Verified company name appears in certificate details.

• Issued in 1–5 business days • Highest identity vetting • Supported on Multi-Domain (non-wildcard) • Best for: Banking & enterprise brands
ARCHITECTURE GUIDE

Multi-Domain vs. Wildcard vs. Multi-Domain Wildcard

Three related products solving three different domain coverage architectures.

DISTINCT ROOTS

Multi-Domain (SAN)

Covers multiple distinct primary domains (domain.com, domain.net, shop.org). Pick this when hostnames don't share a parent domain.

• Secures multiple primary domains • Distinct TLDs & hostnames • Does not cover subdomains automatically • From $21.66/yr
SUBDOMAINS

Wildcard SSL

Covers one primary domain plus every first-level subdomain under it (*.domain.com). Pick this when all hostnames share one parent domain.

• One base domain + unlimited subdomains • Cannot cover separate domains • Instant subdomain expansion • From $56.33/yr
HYBRID MAXIMUM

Multi-Domain Wildcard

Combines both: multiple primary domains plus first-level subdomains of each (*.domain.com, *.brand.net) on a single certificate.

• Multiple domains AND their subdomains • Ultimate portfolio consolidation • DV and OV tiers available • From $150/yr
LIFESPAN & ACME

Certificate Lifespan and Automation in 2026

Managing multiple SAN entries smoothly under CA/Browser Forum Ballot SC-081v3.

TIMELINE MILESTONES

Phased Lifespan Reductions

Maximum SSL/TLS certificate validity dropped to 200 days on March 15, 2026. Next milestones: 100 days in March 2027, and 47 days in March 2029 across all public certificates.

• March 15, 2026: 200 days max (~2 reissues/yr) • March 15, 2027: 100 days max (~4 reissues/yr) • March 15, 2029: 47 days max (~8 reissues/yr) • Subscription terms lock in price
AUTOMATION ADVANTAGE

ACME Protocol Automation

With multiple SANs, manual reissuance becomes an operational bottleneck. ACME automation handles CSR generation, domain control proof, and certificate installation automatically.

• Hands-off renewal across all SANs • Eliminates human configuration error • Multi-year plans queue automated reissues • Dedicated ACME support from Renewal SSL
FAQ

Frequently Asked Questions

Common questions about this SSL certificate type and deployment.

Up to 250 SANs across Renewal SSL’s catalog. Most products include 3 domains by default (1 Common Name plus 2 SANs) and allow adding more at checkout or upon reissuance.

None. Both names describe the exact same product. ‘SAN’ refers to the Subject Alternative Name field that holds the additional hostnames in X.509 certificates. ‘Multi-domain SSL’ is the commercial buyer-facing label.

Yes. Most multi-domain certificates support free and unlimited reissuance during the validity period, allowing you to add, replace, or remove SANs as your domain infrastructure evolves.

Yes. Exchange is the original UCC use case, and the same certificate covers Office 365 hybrid setups. The Common Name and autodiscover hostname go on as SANs.

Yes. Pricing starts at $21.66/year for 3 domains, which is significantly cheaper than purchasing three separate single-domain certificates, while collapsing renewal management into a single date.

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