Exchange 2019 Cu12 New! Jun 2026

CU12 includes , but note that it was released before the following critical security changes that came in later CUs:

Instead, go directly to Exchange 2019 CU14 (or the latest CU available at the time of reading) to get all security fixes, Extended Protection, and better stability. Use CU12 only if you need it as a stepping stone during a staged upgrade. exchange 2019 cu12

Technical Overview: Microsoft Exchange Server 2019 CU12 (KB5011156) CU12 includes , but note that it was

: CU12 transitioned Exchange 2019 to a semi-annual release cadence (H1 and H2), with updates scheduled for approximately April and October each year. Hybrid Server Management : exchange 2019 cu12