Forum Discussion
Mail relay to Office 365 from IIS SMTP Relay
Since about a month we cannot relay email from our IIS SMTP Relay to Office 365. This has worked for a long time, therefore I do not get why it is not working anymore. The account used is still activ...
ndambrosio
Microsoft
MicrosoftHello, Ronald,
You might want to checkout the article below, it has some additional troubleshooting and configuration guidance.
Setting up multifunction device or application to send email using Office 365
https://technet.microsoft.com/en-us/library/Dn554323(v=EXCHG.150).aspx
Let me know if it helps.
Nick