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Exchange 2019 - No mixing of Exchange Servers in a DAG

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Edward van Biljon
Experienced Messaging Specialist with a demonstrated history of working in the information technology and services industry.
In this video we explain why you cannot take an Exchange 2013/2016 database and attach it to an Exchange 2019 server and why you cannot mix Exchange Versions in a Database availability Group (DAG)
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The following article will helps you reseed the failed  database copy
Exchange Server OWA/ECP can be secured Exchange with MFA, Google Re-Captcha, and limiting access to certain IP addresses. MFA can be done with third-party providers or a hybrid system with Exchange Online. ReCaptcha can be integrated using a Google …