Microsoft Exchange and Active Directory Blog
I wish all my friends, readers and supporters a merry and above all peaceful Christmas. I hope you can enjoy the holidays with your loved ones and take a break from the stress of everyday life. To all admins who remain on standby during the Christmas holidays or even fight directly for the well-being of the systems, don't let the holidays be spoiled, it has to be ... Read more
As we all know, Exchange 2019 places considerable demands on the hardware, so it can be difficult if a test environment is needed. If the test environment is also to contain several Exchange servers, hardware can quickly become scarce. Especially for test or dev environments, however, it is usually not worthwhile ... Read more
Microsoft has published details of the preferred architecture for Exchange 2019. This is a whole series of best practices for an Exchange 2019 environment. The article can be found here: Exchange 2019 preferred architecture Here is a short summary of the most important points and a few small comments on my part. Namespaces The best practice provides for 4 ... Read more
Microsoft has released a security update for Exchange 2016 CU 10 and CU 11. The update fixes a tampering vulnerability that has been rated as "Important": A tampering vulnerability exists when Microsoft Exchange Server fails to properly handle profile data. An attacker who successfully exploited this vulnerability could modify a targeted user's profile data. To exploit the ... Read more
One of the new Exchange 2019 features are the "Client Access Rules". Client Access Rules can be used to restrict access to Exchange Server based on certain criteria. One use case would be, for example, to allow access to the EAC only from a management network. Unfortunately, the Client Access Rules in the Exchange 2019 ... Read more
I have divided the migration from Exchange 2016 to Exchange 2019 into four articles. To make the articles easier to find, here are the links in the appropriate order: HowTo: Migration from Exchange 2016 to Exchange 2019 (Part 1) HowTo: Migration from Exchange 2016 to Exchange 2019 (Part 2) HowTo: Migration from Exchange 2016 to ... Read more
In the last part of the article series "Migration from Exchange 2016 to Exchange 2019", the uninstallation of Exchange 2016 is prepared and the migration completed. The small Troubleshooting section is dedicated to the most common cause of failed or stopped MoveRequests. During migrations, problems can always occur that could not be ruled out beforehand. The causes can be ... Read more
Sophos UTM 9.6 now also offers the long-awaited support for free Let's Encrypt certificates. Although the UTM only supports the ACMEv1 protocol and therefore cannot request wildcard certificates, SAN certificates with up to 100 DNS names can be requested automatically. Brief overview of Let's Encrypt Let's Encrypt is a certification authority (CA) that ... Read more
In part 3 of the article series "Migration from Exchange 2016 to Exchange 2019", it is now time to migrate the data. Specifically, it is about moving the various mailboxes and public folders from Exchange 2016 to Exchange 2019. I am moving the various mailbox types individually here, if no public folders or shared mailboxes (shares) are used, you can ... Read more
Part 1 of the article series "Migration from Exchange 2016 to Exchange 2019" only described the test environment and the installation of Exchange 2019. Now the more interesting steps follow. This part is about the configuration of Exchange 2019 for co-existence with Exchange 2016. The aim of this article is to create a functional Exchange 2019 server and ... Read more
