Microsoft Teams Direct Routing Certificate Providers

by Jens Madsen

Getting ready to setup the home lab again to tinker with Teams Direct Routing, I’m in need of a single server certificate for the virtual SBC that I will be publishing. As I am not a Microsoft MVP, I don’t get the same perks, like free certificates from DigiCert. So it was time to look … Continue reading Microsoft Teams Direct Routing Certificate Providers

Configure SPF and DMARC for Office 365 and IIS SMTP.

by Jens Madsen

So, what is all the fuss with DMARC when we already have SPF in place? Aren’t we already validating the sending SMTP domain? The answer is; yes and no. The SMTP domain is only being partially validated. This is meant to be a “how to” tutorial and by no means a detailed explanation on how … Continue reading Configure SPF and DMARC for Office 365 and IIS SMTP.