The following is a list of Exchange Cumulative Updates and Security updates for Exchange 2019 and Exchange 2016 and Exchange 2013 as of April 24, 2024. Microsoft has released a new Hotfix Update (HU) for Exchange Server. This new HU contains all fixes in the last SU, plus new features.

Important or interesting links:

• Exchange health checker – https://microsoft.github.io/CSS-Exchange/Diagnostics/HealthChecker/

Exchange 2019 CU14

• Cumulative Update 14 for Exchange Server 2019 (KB5035606) – https://www.microsoft.com/en-us/download/details.aspx?id=105878
• Security Update 1 for Exchange 2019 CU14 (KB5036401) – https://www.microsoft.com/en-us/download/details.aspx?id=105920
• Exchange 2019 CU14 Hotfix Update 2 (KB5037224) – https://www.microsoft.com/en-us/download/details.aspx?id=106021

Exchange 2019 CU13

• Cumulative Update 13 for Exchange Server 2019 (2023 H1 Cumulative Update,  KB5020999) – https://www.microsoft.com/en-us/download/details.aspx?id=105180
• Security Update 5 for Exchange 2019 CU13 (KB5036402) – https://www.microsoft.com/en-us/download/details.aspx?id=105921 
• Exchange Server 2019 CU13 Hotfix Update 6 (KB5037224) – https://www.microsoft.com/en-us/download/details.aspx?id=106022

Exchange 2019 CU12

• Cumulative Update 12 for Exchange Server 2019 (2022 H1 Cumulative Update) (KB5011156) – https://www.microsoft.com/en-us/download/details.aspx?id=104131
• Security Update 11 for Exchange 2019 CU12 (KB5032146) – https://www.microsoft.com/en-us/download/details.aspx?id=105714
• Please be aware that Microsoft no longer releases Security Updates for Exchange 2019 CU12!

Exchange 2016

Exchange 2016  CU23:

• Exchange 2016 CU23 (KB5011156) – https://www.microsoft.com/en-us/download/details.aspx?id=104131
• Exchange 2016 CU23 Language Pack – https://www.microsoft.com/en-us/download/details.aspx?id=104130
• Security Update 12 for Exchange 2016 CU23 (KB5036386) – https://www.microsoft.com/en-us/download/details.aspx?id=105922
• Exchange 2016 CU23 Hotfix Update 13 (KB5037224) – https://www.microsoft.com/en-us/download/details.aspx?id=106023

Exchange 2016 CU22 (09/24/2021):

• Exchange 2016 CU22 (KB5005333) – https://www.microsoft.com/en-us/download/details.aspx?id=103478
• Exchange 2016 CU22 UM Language Pack – https://www.microsoft.com/en-us/download/details.aspx?id=103479
• Security Update for Exchange 2016 CU22 (KB5019758) – https://www.microsoft.com/en-us/download/details.aspx?id=104728
• Be aware that Microsoft no longer releases Securitiy Updates for Exchange 2016 CU22!

Exchange Server 2013:

Exchange 2013 CU23:

• Cumulative Update 23 for Exchange Server 2013 (KB4489622) – https://www.microsoft.com/en-us/download/details.aspx?id=58392
• Exchange Server 2013 CU23 UM Language Packs – https://www.microsoft.com/en-us/download/details.aspx?id=58392
• Security Update 21 for Exchange 2013 CU23 (KB5024296) – https://www.microsoft.com/en-us/download/details.aspx?id=105092

Please be advised that Exchange 2013 CU23 is out of support as per April 11, 2023. No more security updates are released for Exchange 2013 after this date.