Microsoft has postponed the release of Cumulative Update 15 for Exchange Server 2019 until January 2025, causing concern among customers as the platform approaches its end of support on October 14. The update is essential for smooth transitions to Exchange Server SE. While Microsoft acknowledged complexities and issues detected by testers, it remains unclear when CU15 will be finalized. This situation has been exacerbated by the considerable time gap before support ends, leaving users apprehensive about their current deployments.
We have committed to Exchange Server CU15 being the 'code equivalent' to Exchange Subscription Edition (SE) RTM release, making it critical for upgrades.
Customers in Microsoft's Technology Adoption Program have reported issues with CU15, leading to a reset in the testing process and further delays.
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