As everything relies heavily on DNS and the ability to resolve names to IP’s etc., if your DNS upstream is not working or something firewall/internally is not working, things do…
In one of my lab machines I was sifting through the log files and came across Event ID 12000 as shown below. As this lab machine does not have internet…
Over the past few years, Microsoft Exchange Server has come under heavy attack and with each new Cumulative Update (CU) and Security Update (SU), CVE’s are addressed and closed. The…
We all know about the ongoing attacks on Exchange Servers and it is vitally important that you keep up-to-date with patching of your environments, even if it is standalone servers…
If you are new to Exchange, let me bring you up to speed with how attacks have increased since 2020 and Exchange servers that are published to the internet are…
The October 2022 security updates for the different Exchange versions are out and it is advisable to update your servers. In my lab, I am running different versions of Exchange…
At the MEC event that recently took place, it was announced that you can now introduce Windows Server 2022 domain controllers if you are using the latest Cumulative Updates for…
In March 2020 when we had many Exchange servers world wide attacked, the Team at Microsoft put together a nice PowerShell script that provides plenty of output but the most…
In some of my articles, I have made mention of implementing SPF, DMARC and DKIM records for your Exchange environment but many ask the question on how do you setup…
If you are running Exchange 2016 and Hybrid or Exchange 2019 and Hybrid, generally managing items are done on-premise and then synced up to Office 365 with AD Connect. I…