Exchange 2019

ExchangeHealthChecker: Script to detect configuration problems

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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

Exchange security updates must be installed urgently

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It's currently in the news again: attackers are trying to exploit Exchange security vulnerabilities. This time, however, the updates have been available for some time. Anyone who has not yet installed the latest security updates should do so as soon as possible. Here is a summary of the available security updates: New security updates for Exchange Server (April 2021) New security updates for Exchange Server ... Read more

Exchange Server and AMSI: Some information

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With the July 2021 CUs for Exchange Server, Microsoft has introduced AMSI integration as a new feature for Exchange 2016 and 2019. Here is some information about the new feature. What is AMSI? The Windows AntiMalware Scan Interface (AMSI) is an interface with which services and applications can be integrated into anti-malware solutions. ... Read more

Exchange Server: OWA and EAC do not start after installing the July updates

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After installing the July security updates, it may happen that the Exchange Administrative Center (EAC) and OWA can no longer be opened. The cause is an expired certificate for Exchange Server OAuth authentication. Microsoft also refers to this problem in the release notes of the updates. Unfortunately, the notes on the updates are overlooked ... Read more

New security updates for Exchange Server (July 2021)

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A week ago, Microsoft released new security updates for Exchange Server 2013, 2016 and 2019. I'm only reporting on this now because I've been on vacation for the last 14 days. But thanks to the CVE reporter, this shouldn't be a problem :-) The following four vulnerabilities are closed by the updates CVE-2021-31196 CVE-2021-34470 CVE-2021-33768 CVE-2021-31206 Here's ... Read more

Exchange 2016/2019: AMSI integration causes problems with Outlook

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The new AMSI integration introduced with CU21 for Exchange 2016 and CU10 for Exchange 2019 in conjunction with various anti-virus scanners causes some serious problems. The Outlook connection sometimes becomes so slow that it is no longer possible to work. Even starting Outlook can take several minutes. Outlook repeatedly fails to respond, ... Read more

Exchange Server: Change display name for external mails

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In the standard Active Directory setting, the display name is formed from the first and last name. However, many companies, mostly in German-speaking countries, change the generation of the display name to "last name and first name". This has the advantage that users are easier to find in the Exchange address book and in the Active Directory, as the sorting is based on the surname and ... Read more