Office 365 Mail Flow Troubleshooter
The Office 365 Mail Flow Troubleshooter is a walk-through that can help you identify and troubleshoot any problems you may be facing while sending and receiving mail. It can also help you if your mail gets delayed in the following scenarios: Using the Office 365 Mail Flow Troubleshooter you will be able to isolate the problem, which in turn should help you solve it. This guided walk-through is intended for Office 365 and on-premises administrators. You can check it out here at Microsoft.com.
