Microsoft Exchange and Active Directory Blog
Microsoft has announced that customers with Microsoft 365 Enterprise licenses will also be migrated to the new Outlook from 2026. In contrast to "classic Outlook", the "new Outlook version" is a web app. A corresponding announcement was published today on Heise Newsletter. However, the message can also be misunderstood somewhat, ... Read more
Yesterday, security updates were released for Exchange Server 2016 and Exchange Server 2019. In connection with Outlook and Exchange Server 2019, there are now increasing reports of problems with the search. Admins are reporting problems on the Exchange Team Blog and in the comments to my post. The search apparently produces the error message ... Read more
The Outlook vulnerability CVE-2023-23397 is currently being actively exploited. This is particularly critical as exploitation is possible without user interaction. By exploiting the vulnerability, attackers can obtain NTLM hashes of the user and possibly use them for subsequent attacks. To exploit the vulnerability, it is sufficient to send a prepared e-mail or a calendar invitation to the user ... Read more
Two Outlook Autodiscover settings, which are active in the default setting, often cause problems when setting up Outlook accounts. In the default setting, Outlook always tries to retrieve Autodiscover settings from Microsoft 365, which often leads to problems with on-prem Exchange servers. Outlook also tries to retrieve the Autodiscover settings from the root domain ... 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
Ab und an kann es sinnvoll sein, wenn man einen Überblick der eingesetzten Outlook Versionen bekommt. Hin und wieder finden sich sicherlich mal wieder alte Office / Outlook Versionen, welche so eigentlich schon gar nicht mehr im Einsatz sein sollten. Bei Exchange 2016 / 2019 Servern, lässt sich die Outlook Version mit der PowerShell aus … Read more
Who isn't familiar with the evil "Reply all" function in Outlook? An important piece of information is quickly sent to the whole company, and then there's a flood of replies because the recipients use the "reply all" function: Depending on the size of the organization, such a flood of emails can generate a few million emails and thus ... Read more
On March 17, 2018, I drew attention to an idea by Jeff Guillet. The idea is about saving email signatures as part of the Exchange mailbox so that a uniform signature is possible on all devices. Up to now, the Outlook e-mail signature has been saved in the user profile of the respective client. The idea of ... Read more
I have now received a lot of questions about Outlook on Windows 7 in conjunction with Exchange 2019. The error and solution have always been the same, so here is a short article about it. Outlook (regardless of the version) on Windows 7 cannot connect to Exchange Server 2019. Outlook then displays this message at startup ... Read more
This short article is intended to list the most common causes of problems with the Outlook connection to Exchange during migration. Connection problems often occur after a mailbox has been moved to a newer Exchange version. Outlook then often displays one of the following messages: The Microsoft Exchange administrator has made a change that requires Outlook to be restarted. ... Read more
