Exchange Server 2019 Cumulative Update H1 2025 (CU15) Released Microsoft has released the highly anticipated 2025 H1 Cumulative Update (CU15) for Exchange Server 2019. This marks a significant milestone as it will be the final cumulative update for Exchange Server 2019 before it reaches end-of-life in October 2025. Key Features and Changes Feature FlightingExchange 2019 CU15 [...]
Microsoft kicks off 2024 with a uneventful Patch Tuesday, maintaining the trend from December by not releasing any patches for Exchange Server 2019. Exchange Server 2019: CU14 Delayed to Jan 2024 There are still two more CUs for Exchange Server 2019: CU14 and CU15. CU14 is in its final stages of testing and validation and will be [...]
Exchange Server admins can take a break to enjoy the upcoming holidays! There are no security updates (SUs) for Exchange Server 2019 and 2016 this month. Exchange Server 2019: CU14 Delayed to Jan 2024 Microsoft released a blog to clarify the status of cumulative updates for the on-premises email platform. Administrators expecting the release of [...]
Last year, Microsoft announced a new servicing model for Exchange Server, with two Cumulative Updates (CUs) per year. However, Microsoft won't be releasing a second CU for 2023. There are two more CUs on the horizon for Exchange Server 2019: CU14 (H1 2024) and CU15 (H2 2024). The release date for CU14 has shifted to [...]
Microsoft's Shift in Servicing Cadence In a move that reflects a commitment to both innovation and stability, Microsoft announced last year a change in its servicing model for Exchange Server. This strategic shift saw the company adopt a twice-yearly release schedule for Cumulative Updates (CUs), targeting the first and second halves of each calendar year. [...]
Microsoft has released Security Updates (SUs) for vulnerabilities found in: Exchange Server 2019 Exchange Server 2016 SUs are available for the following specific versions of Exchange Server: Exchange Server 2019 CU12 and CU13 Exchange Server 2016 CU23 The November 2023 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal processes. These vulnerabilities affect [...]
Microsoft has released Security Updates (SUs) for vulnerabilities found in: Exchange Server 2019 Exchange Server 2016 SUs are available for the following specific versions of Exchange Server: Exchange Server 2019 CU12 and CU13 Exchange Server 2016 CU23 The October 2023 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal processes. Although we are [...]
Microsoft has re-released Security Updates (SUs) for vulnerabilities found in: Exchange Server 2019 Exchange Server 2016 SUs are available for the following specific versions of Exchange Server: Exchange Server 2019 CU12 and CU13 Exchange Server 2016 CU23 More information from Microsoft about the re-release is available here. The following table describes the actions you need to take based on [...]
UPDATE: Microsoft re-released the SU on August 15th, 2023. See more details here. The August 2023 SUs address vulnerabilities responsibly reported to Microsoft by security partners and found through Microsoft’s internal processes. Although we are not aware of any active exploits in the wild, our recommendation is to immediately install these updates to protect your [...]
Microsoft released security updates for Exchange Server on June 14, 2023. While no active threats are currently known to be exploiting these vulnerabilities, IT admins should prioritize patching them as soon as possible. One of the most critical vulnerabilities is a bypass of fixes for two Exchange Server remote code execution bugs. This vulnerability exists [...]
Microsoft released Cumulative Update 13 for Microsoft Exchange Server 2019 on May 3rd, 2023. This cumulative update is a security update. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues , including updates in the March 2023 SU. Highlights: Microsoft has announced that they are bringing Modern Authentication to pure on-premises Exchange Server environments [...]
