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 Online App-Only Authentication Error AADSTS70011 Invalid Scope
As more people are starting to use the Exchange Online V2 module (yay!), there are some new and different issues appearing.
In this case, the command to connect to the …
Does Exchange Setup Automatically Run PrepareSchema?
The question "Does Exchange setup automatically run /PrepareSchema?" was something that came up many times in the recent Hafnium remediation activities. This was due to many customers not updating Exchange …
TenantOrganizationConfig Required When Preparing Active Directory
When running /PrepareSchema in an Exchange organisation with an existing Exchange Hybrid deployment you may run into an error which states:
"A hybrid deployment with Office 365 has been detected. …
Create Azure Az VM Using Existing UnManaged VHD
The days change, but sometimes the issues stay the same. This is a redux of an existing post where there was an issue back in 2016 when I was not …
Unable to Run Exchange Setup–Pending Reboot From a Previous Installation
When installing Exchange updates, I place the server into maintenance mode and restart it prior to installing the actual Exchange update. This is due to have being burned many times …
Exchange Managed Availability State Unknown
The below is one of the cases where the "Zen of Exchange Management" is what fixes the issue. I've been know to say that sometimes you just need to wait …
Exchange 2016 CU20 PrepareAD Required
This is a quick heads up for those who may be deploying Exchange 2016 in the near future. If you are currently on Exchange 2016 CU19 there are no AD …
Should I Overwrite The Default Exchange SMTP Certificate?
When adding a TLS certificate on an Exchange server, the inevitable prompt will appear to enquire if you wish to overwrite the default SMTP certificate binding. While the UI in …
Azure Firewall Rule Not Working – Orange Triangle
The below is from a customer situation where an Azure Network Security Group (NSG) firewall rule entry was not working as they expected. This was was created to allow RDP …
Faulting Module Name NTdll.dll
One of my hosted lab environments ran into series of issues, and after unplanned maintenance there were multiple problems to resolve. The below error with a faulting ntdll.dll module was …