Exchange 2019:- ProxyNotShell Exploit
In two of my previous blog posts, we looked at exploiting unpatched/vulnerable Exchange servers with “ProxyLogon” and “ProxyShell”. As the exploit lists keep growing, we will look at the “ProxyNotShell”…
Exchange 2019:- Brute forcing OWA to gain access to user accounts
We all know that end users hate complex passwords and having to change passwords often leads them to use the same password but add a number or character at the…
Exchange 2013/2016/2019:- How NMAP reveals Exchange Server information.
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…
Exchange 2013 – EOS, Time is running out, upgrade your systems
This is a reminder that Exchange 2013 support ends on April 11 2023. Make sure you start preparing for deployment of new Exchange 2019 Servers, Virtual or Physical or transition…
Exchange 2013/2016/2019:- Are you over exposing your server to the internet?
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…
Exchange 2016/2019 :- Apply the October 2022 Security update
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…
Exchange 2013/2016 – Updated support for Active Directory environments
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…
Exchange 2013/2016/2019:- Health Checker a must have for Exchange Admins
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…
Exchange 2016/2019: Implementing DKIM
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…
Exchange 2016:- X-OWA-Error Microsoft.Exchange.Data.Storage.AccountDisabledException
Provisioning accounts in Active Directory and Exchange is not a new task for Admins. However when you provision something and it does not want to work is where the troubleshooting…