April 2021 Exchange Security Updates
Today is patch Tuesday for April 2021 and there are critical Exchange server security updates in the release. You can review all of the affected products on the MSRC blog…
Security
Exchange & TCP/IP Port Range
The below is an interesting result after installing Exchange. The act of installing Exchange will change how TCP/IP operates on the server with respect to ephemeral connections.
This may manifest …
Install March 2021 Security Update–Exchange 2013 Net Framework 4.7.2
You will have seen the multiple posts and communications around the Hafnium Exchange security issue. One of the most disconcerting issues has been the number of Exchange installs that …
Collected Links For Hafnium – March 2021 Exchange Security Issue
The below are a series of links, tips and some very brief thoughts on Hafnium. I will purposefully not include the content of the other locations as it is changing …
Exchange 2010 SP3 RU32 Released
Today is an out of band security release for Exchange. Due to the way that Exchange 2010 is serviced, security updates are released as a new update rollup (RU).…
Out of Band Critical Exchange Security Updates–March 2021
Security updates were released today for Exchange 2010, 2013, 2016 and 2019. Attacks were detected which leveraged these vulnerabilities, so an out of band set of updates was released
This …
Defender For Identity Sensor Service Fails To Start on AD FS – Sequence Contains No Elements
After installing Defender for Identity sensor onto AD FS, you may experience an issue where the service does not enter the running state.
In the Microsoft Defender for Identity portal …
Exchange December 2020 Security Updates
Please be aware that Exchange 2013, Exchagne 2016 and Exchange 2019 security updates were released as part of the December 2020 patch Tuesday release. The overall rating is critical, and …
Exchange Managed Availability Broken With TLS 1.2 Changes
In most enterprise customers there is a segregation of duties between multiple teams. This could be networking and desktop. Or Windows Server platform and messaging. It was the split in …
A Tale of Two Certificates–SHA1 Certificate Created During Exchange 2016 Installation
The security space is constantly evolving, and while a lot of the recent work has been on moving to TLS 1.2, a previous focus in the industry was to stop …