Update procedure Exchange CU21 & Security update
Download Cumulative Update 21 for Exchange Server 2016 (KB5003611) : https://www.microsoft.com/en-us/download/details.aspx?id=103242 Download Security Update For Exchange Server 2016 CU21 (KB5004779) :https://www.microsoft.com/en-us/download/details.aspx?id=103311 Start by updating Active Directory using the latest CU installation …