Sectigo OV UCC is designed especially for Microsoft Exchange and Communication servers - although they can be deployed on other servers as well. With Sectigo Unified Communications Certificate (UCC) you can encrypt and secure up to 250 different domains. Being an OV certificate organization goes through a light business vetting. This certificate provides 256-bit encryption and 2048-bit RSA signature key. Also, Sectigo backs the certificate with a warranty of $1,000,000 and the Sectigo Secure site seal.