To download the "fixed" and most stable version of Microsoft Exchange Server 2016, you should look for the latest . These updates serve as full installation ISOs, meaning you do not need a "base" version first; you can install directly from the CU ISO. The Definitive Download Link
Before you run your fixed ISO, ensure your server meets these specs:
If you are setting up a new on-premises environment or recovering a failed server, you might be searching for the that includes the latest fixes.