The following is a list of Exchange Cumulative Updates and Security updates for Exchange 2019 and Exchange 2016 and Exchange 2013 as of May 4, 2023.

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

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 7 for Exchange 2019 CU12 (KB5024296) – https://www.microsoft.com/en-us/download/details.aspx?id=105089

Exchange 2019 CU11

• Cumulative Update 11 for Exchange Server 2019 (KB5005334, Sept 2021, https://www.microsoft.com/en-us/download/details.aspx?id=103477)
• Security Update 11 for Exchange 2019 CU11 (KB5024296) – https://www.microsoft.com/en-us/download/details.aspx?id=105090

Exchange 2019 CU10

• Cumulative Update 10 for Exchange Server 2019 (KB12698) – https://www.microsoft.com/en-us/download/details.aspx?id=103241)
• Security Update for Exchange 2019 CU10 (KB5007409) –  microsoft.com/en-us/download/details.aspx?id=103642
• Please be aware that Microsoft no longer releases Security Updates for Exchange 2019 CU10!

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 7 for Exchange 2016 CU23 (KB5024296) – https://www.microsoft.com/en-us/download/details.aspx?id=105091

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 will be out of support on April 11, 2023. No more security updates will be released for Exchange 2013 after this date.