Microsoft Exchange and Active Directory Blog
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
High Volume E-Mail (HVE) is an Exchange Online service that supports the sending of bulk mails and is not subject to the limits of a normal user mailbox. High Volume E-Mail is currently still in the public preview, but can already be used free of charge as part of the Exchange Online or Microsoft 365 subscription, a license for the HVE account is ... 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
In the second part of the migration from Exchange 2016 to Exchange 2019 CU15, Exchange 2019 was configured. This part now deals with the migration of the mailboxes to the new server. Finally, the old Exchange 2016 server can be uninstalled and the migration completed. Migrating the mailboxes The mailboxes can be migrated via the Exchange Admin Center ... Read more
In the first part of this article series, I briefly introduced the environment, the Exchange 2019 server has now been installed and the configuration and migration can begin. The second part deals with the configuration of the installed Exchange 2019 server. Here is an overview of the environment: If it is a larger Exchange ... Read more
The current CU15 for Exchange Server 2019, like the CU14, has been released for Windows Server 2025. The CU15 supports the inplace upgrade to Exchange Server SE RTM. However, the Inplace Upgrade only supports the upgrade of the Exchange installation. The operating system cannot be upgraded via Inplace Upgrade. So if you want to upgrade from October 2025 ... Read more
I am now having problems updating to CU15 on the second Exchange 2019 CU14 server. The CU15 setup aborts in my environment on a Windows Server 2022 with January updates at step 4 of 16 with the following error: On the first server, I wasn't quite sure whether the server wasn't still ... Read more
