Microsoft Exchange and Active Directory Blog
Unfortunately, there are still applications or devices that can only send mails without authentication. This is not possible in the Exchange Server default setting. However, a new receive connector can be set up which allows anonymous relay for certain IP addresses. The following commands can be used on a server with an English-language operating system. Read more
It's been quite a while since I wrote an article about the Exchange 2019 installation. The original article dealt with the installation on Windows Server 2019, but since Windows Server 2022 is now also supported by Exchange and a few small things have changed, here is a fresh article. Defender ... Read more
Several readers of this blog have requested an article on the subject of "Outlook Anywhere for certain users only". The requirement is always quite similar: Only selected users should be allowed to connect to the Exchange Server from the Internet via Outlook Anywhere, all other users should not have this option. In other words, users should ... Read more
A reader asked for an article on how brute force attacks on Exchange servers can be prevented. Since Exchange servers in smaller environments are often directly accessible on the Internet (e.g. via port forward) and can also be identified very quickly thanks to autodiscover, Exchange servers are very suitable for brute force attacks. In a brute force attack ... Read more
