Office 365 Exchagne Hybrid deployment
Hybrid deployments can be configured for on-premises Exchange 2007-based organizations or later but you have to install at least one hybrid server in your existing Microsoft Exchange organization e.g. Exchanger server 2010/13. Hybrid deployment prerequisites Office 365 Tenant (you can also deploy it on trial) On-premises environment Exchange 2010 minimum Active and Valid Public SSL certificate e.g. DigiCert https://www.digicert.com/exchange-ssl-certificate.htm Auto Discover enable video with complete steps