A common issue when deploying Exchange Online Protection (EOP) and Microsoft Defender for Office 365 (MDO) with on-premises Exchange is making Exchang… Read the rest “Configure On-Premises Exchange For EOP Spam Thresholds”
There are a multitude of online tools that help diagnose issues with various mail services, but understanding what these tools actually check is valua… Read the rest “How to Use NsLookup To Check DKIM Record”
Note that there have been changes to Safe Links policy for Microsoft Defender for Office 365 (MDO).
Previously you could add URLs to the Safe Links pol… Read the rest “Migrate Safe Links Block Settings to TABL”
Planning to deploy Office 365 and integrate with your on-premises Exchange infrastructure? Great! While running the Exchange Hybrid Configuration Wi… Read the rest “Microsoft Teams Source IP Address Used Connecting to On-Premises Exchange”
When discussing network configuration for Office 365, there will be a series of issues and challenges that need to be addressed. Ideally this is all … Read the rest “The Way Things Were–EOP IP Ranges October 2018”
A recent discussion revolved around adding domains to Azure, and how that would manifest iteslf in Office 365 and Azure. This was a customer where on… Read the rest “Add Domain to Azure, What Is Its EXO Status?”
This is a topic that still comes up when doing email investigations. After there has been an issue, we want to perform analysis to determine what may… Read the rest “Exchange Online Transport Rule Audit”
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 t… Read the rest “Exchange Online App-Only Authentication Error AADSTS70011 Invalid Scope”
When running /PrepareSchema in an Exchange organisation with an existing Exchange Hybrid deployment you may run into an error which states:
"A hybrid d… Read the rest “TenantOrganizationConfig Required When Preparing Active Directory”