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 …

Exchange Online Enforcement Pause

Lot of people already know the new Microsoft strategy for blocking outdated Exchange OnPrem Versions in hybrid environments. See this old article which describes the most important informations, see also the timeline for throttling and blocking. https://techcommunity.microsoft.com/t5/exchange-team-blog/update-on-transport-enforcement-system-in-exchange-online/ba-p/3827774 After some time the Exchange Teams announced an new article about pausing this enforcement with throttling and blocking. …