Unable to run Office 365 / Exchange Hybrid Wizard – “Content was blocked because it was not signed by a valid security certificate”

Unable to run Office 365 / Exchange Hybrid Wizard – “Content was blocked because it was not signed by a valid security certificate”

Problem

From the Exchange Admin Center you run the Hybrid configuration setup

Hybrid1

You are prompted to login to Office 365

Hybrid2

You enter your credentials

Hybrid3

And then receive this message / warning

Hybrid4

You are unable to complete the Hybrid configuration

Solution

You can resolve this issue by installing the certificate as follows: read more