April 2024 Exchange Server Hotfix Updates

Some days ago Microsoft released a small security update for Exchange Servers. The original post from Exchange Team. This Update is OPTIONAL so there are some new features available in Exchange OnPremises. See the original Download Links: Update also brings some new features: Some fixed issues: The issue Outlook doesn’t display unread message icon caused …

Mark E-Mails external with Exchange Online External Sender Identification

For some time now, Exchange Online has offered the option of making external emails visible directly in Outlook as well as OWA and Outlook Mobile. This function is called quite unspectacularly “ExternalInOutlook”. In action the function looks like this: I have already published an article on the topic of email banners with Exchange Transport Rules …

10 years Blog IT koehler

It’s hard to believe, but this blog is exactly 10 years old today. I launched this blog in 2014, and since then, more than 2 million people have found information on it. Originally, the intention was to create an online knowledge database for myself, but it has evolved well due to the number of accesses …

Exchange 2019 / 2016 Security Update March 2024

After releasing CU14 for Exchange Server 2019, the ‘normal’ period for Exchange security patches is still in progress. Here you can find the offical announcement of March Security Patch 2024. As already known before only latest CUs are supported for this security patch. See the download links: Update processes did not change at all, so …

Exchange Online mailbox apps check via PowerShell

Some days ago I got a ticket where someone could not load his calendar in Microsoft Teams. Outlook worked fine the only thing was Out of Office Notification, also did not work. After some research I found the solution by activating EWS on this specific mailbox. One our later everything was fine. You can find …