Microsoft Exchange and Active Directory Blog
I recently had the requirement to export all valid certificates of a Windows certification authority so that the certificates could be entered into a certificate management software. I therefore created a small PowerShell script that exports all certificates that are still valid at the time the script runs to a folder. Since only ... Read more
Exchange Emergency Mitigation (EM) is, as already mentioned in this article, available from CU 11 for Exchange 2019 and CU 22 for Exchange 2016. The way it works is as simple as it is effective: The Exchange servers check every hour whether there is a new set of rules for mitigating a vulnerability. For this purpose, a signed XML document is sent every hour from ... Read more
Microsoft has released new updates for Exchange Server 2016 and 2019. Originally, Exchange 2016 was only supposed to receive security updates and no more new features via CU. However, CU 22 has now been released for Exchange 2016. CU 11 has been released for Exchange 2019. Both CUs contain the new "Exchange Emergency Mitigation" feature, which ... Read more
From 01.11.2021, at least Outlook 2013 SP1 is required for Microsoft 365. Previously, older Outlook versions usually worked with Microsoft 365 without any problems. From 01.11.2021, however, Microsoft will now block Outlook versions older than 2013 SP1 from being used and block these versions. Here is the corresponding article from Micorsoft: New ... Read more
This year's Micrsooft Ignite will once again be held as an online conference. As last year, participation in Ignite is free of charge. Registration is sufficient to either follow the sessions live online or to watch the recordings of the sessions later: Microsoft Ignite 2021 Ignite will take place from 02.11. to 04.11.2021. ... Read more
I have just uploaded the new version 3.10 of the Exchange Reporter. In the new version I have fixed numerous bugs that were reported to me. Here is a list of the fixed problems: mbxreport.ps1: Mailboxes close to the sending limit are not displayed (thanks Mario) mailreport.ps1: spelling error corrected (thanks Matthias) Error of module assignment in settings.ini corrected HealthChecker.ps1: HealthChecker script updated ... Read more
In a previous article, I described where the AMSI log files of the Exchange server can be found. As the logs are stored locally on the Exchange server, the logs are of little use if nobody reads them and attacks are only detected when it is too late. However, the logs can also be easily ... Read more
Microsoft has released Windows Server 2022. The successor to Windows Server 2019 has the build number "20348.169, Version 21H2" and is available in the Standard and Datacenter editions. An additional edition with the name "Windows Server 2022 Datacenter: Azure Edition" is only available on Microsoft Azure. There are no Essentials with Windows Server 2022 ... Read more
During a migration from Exchange onPrem to Microsoft 365, the error occurred that users synchronized via AADConnect could not log in to some services (such as Exchange Online and Office Portal) (HTTP 500 error). However, it was possible to log in to Teams and OneDrive without any problems. Logging in via Edge and Internet Explorer was also possible on ... Read more
The ExchangeHealthChecker has been around for some time, but many people still seem to be unaware of this useful script. However, it is worth running the script from time to time to prevent problems. The ExchangeHealthChecker analyzes the Exchange configuration and lists the most common configuration problems. The script therefore makes troubleshooting much easier. For example, the ExchangeHealthChecker lists expired certificates, ... Read more
