Forum Discussion
Microsoft Stop the Spam
Am I the only one that sees this as an issue? I have several customers that I manage, none of which are currently on Office 365. They have in house Exchange servers. But what we are seeing is the f...
You need to investigate your staff and your mailbox audit logs. I've had users get their accounts compromised via phishing and they will get into their exchange online accounts and setup rules to hide messages and spam internal people. MFA would all but kill this issue, but it happens. Are you sure that these legit looking messages aren't actually being sent internally from compromised accounts?