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 2013 SP1
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 …
Exchange 2013 OnPremisesSmtpClientSubmission – Unhealthy After Disabling TLS 1.0 and TLS 1.1
After going through the steps to disable TLS 1.0 and TLS 1.1, it was noted that Managed Availability was not happy with one particular component in Exchange 2013. This was …
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 …
Exchange Managed Availability Error – OutlookRpcSelfTestProbe
This case illustrates the “fun” with Managed Availability a particular customer had after making changes to their servers. The servers were built back in 2014, and as such the default …
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 …
Exchange Setup – Certificate Is Expired – Part Deux
Previously I managed to break one of my labs when replicating a customer situation and then had to fix it as noted in this post from 2017.
This time …
QuickTip – Which Managed Availability Components Are Unhealthy?
Exchange 2013 introduced the Managed Availability feature, so Exchange can self monitor and perform recovery actions upon itself. While this has greatly helped Exchange become more self-healing, one of the …
Local Endpoint Used For Cross-Premises Free Busy Lookup
When troubleshooting cross-premises calendar availability issues, it can be useful to know the name of the local on-premises endpoint which is used. By knowing the path and URL, you can …
Beware the Exchange Hybrid Configuration Wizard Doppelganger
Perhaps the best thing to come to Exchange over the last 10 years was the Hybrid Configuration Wizard (HCW). While many take this feature for granted, if you had to …