If you have a 3rd party mail gateway in front of your Exchange Online tenant and haven’t already fixed the bypass issue, then you’re opening yourself up to inbound emails that completely skip the usual checks performed by Exchange Online Protection. What is the bypass issue? If you use a 3rd party gateway as your… Read More: The EXO 3rd Party gateway bypass is even worse than… »
If you’ve ever needed to do some troubleshooting with Exchange Online (EXO) message delivery, you’ll know how useful the Extended Report capability can be. One thing I noticed recently is that while the Summary Report is typically available within a few minutes of the message being handled by EXO, it can take considerably longer for… Read More: Patience required when running Extended Reports in Message Trace »
For some organisations, encryption of data at rest is considered an important security control, especially in the context of cloud solutions. With core Office 365 services (SharePoint Online and Exchange Online) you have the option of controlling your own keys through the method known as Customer Key. But is there anything built-in that provides encryption… Read More: Exchange Online – Are your mailboxes encrypted? »
It seems that a couple of weeks ago my standalone Exchange Online Protection (EOP) configuration was changed without me being involved. Basically, it looks like my default Accepted Domain was changed from type “Internal Relay” to “Authoritative” without my knowledge or consent. The first I knew of this was when I noticed my on-premises mail… Read More: EOP Accepted Domain silently modified »