Microsoft Exchange and Active Directory Blog
Microsoft has released new updates for all supported Exchange Server versions. The September updates do not include security updates, but contain updates for hybrid scenarios. Here you can download the updates directly: Microsoft writes about the updates: The October 2025 SUs fix security vulnerabilities that have been responsibly reported to Microsoft by security partners and identified by Microsoft's internal processes. Read more
Microsoft has released new updates for all supported Exchange Server versions. The September updates do not include security updates, but contain updates for hybrid scenarios. Click here to download the updates directly: The September update is an optional update, so the update is not mandatory, but fixes problems in hybrid operation ... Read more
Microsoft released new security updates for Exchange Server 2016, 2019 and SE in August. The updates have been available since 12.08., but as I was on vacation, the message appears here late. Click here to download the updates directly: The updates fix the following vulnerabilities, all of which are rated „Important“. Read more
Microsoft announced yesterday that Exchange Server 2016 and 2019 can receive extended security updates. The ESU program (Extended Security Update program) already exists for Windows Server 2012 and other older operating systems. This is not a general extension of support for Exchange Server 2016 and Exchange Server 2019 beyond October 14, 2025. ... Read more
Microsoft has released new updates for Exchange Server 2016 and 2019. The May updates do not contain any security-critical updates, but fix problems that have been known in some cases since November 2024. Further information can be found on the Exchange Team Blog. Click here to download the May updates: Here you can find the article on the Exchange Team ... Read more
Microsoft has released new updates for Exchange Server 2016 and 2019 today. This is not a security update. The April update can be downloaded here: The update prepares the use of the Graph API in Exchange Hybrid environments. The aim is to replace the EWS API. Microsoft writes the following: As part of our ... Read more
I have already reported on the StalledDueToSource_DiskLatency error during Exchange migrations. At that time, I was able to resolve the error by resolving a spanned volume across several disks. During another Exchange Server 2016 to Exchange 2019 migration, the problem occurred again. Here, too, the StalledDueToSource_DiskLatency error only occurred with the move requests of the ... Read more
When migrating or operating multiple Exchange Servers in an organization, problems can occur when sending and receiving emails between the Exchange Servers. One reader had a case where users from one Exchange server could no longer email users on the other Exchange server. The emails remained in the queue ... Read more
With Exchange Server 2019 CU15, a new function called "Feature Flighting" was introduced. In future, Feature Flighting will enable the administrators of an Exchange organization to control which new Exchange features are activated in the company and when. Microsoft hopes that Feature Flighting will provide an easier way to make new functions available in the company than having to ... Read more
The Exchange Health Checker returns an error if the Exchange Server was not installed in the default path. For example, if the Exchange Server was installed on the D: drive, a path is missing in the configuration for the automatic cleaning of the UnifiedContent directory. The directory then gets bigger and bigger and clutters up the hard disk. This can now be cleaned up automatically. Read more
