If your organization is already running an Exchange Server version, you should verify requirements for coexistence with Exchange server 2019 while planning your upgrade to exchange server 2019. The supported coexistence scenarios between Exchange 2019 and its predecessor's described in table below. Exchange versionExchange 2019 Organization coexistenceExchange 2010 and earlier versionsNot supportedExchange 2013Supported with Exchange … Continue reading Supported coexistence scenarios with Microsoft Exchange server 2019 →