What You Need to Know About CU21 for Exchange 2016
As hopefully many of you already know Exchange Server 2016 entered the Extended Support phase of its product lifecycle on October 14th 2020. During Extended Support, products only receive updates defined by the Fixed Life Cycle. For Exchange Server 2016, the Fixed Life Cycle will include any required product and security updates and time zone definition changes. With the transition of Exchange Server 2016 to Extended Support, the quarterly release schedule of cumulative updates (CU) will end.