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

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You are prompted to login to Office 365

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You enter your credentials

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And then receive this message / warning

 

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You are unable to complete the Hybrid configuration

 

Solution

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

1: Click on the security report icon (the lock symbol in the browser address bar)

2: Click View Certificates

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3: Click “Install Certificate”

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4: Select “Local Machine” and click next

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5: Click Next

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6: Click Finish

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7: Click Ok

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8: Restart Internet Explorer & the Exchange Admin Center.

9: Click enable on the Hybrid setup

10: Log into Office 365 when prompted

You will be returned to the Hybrid setup page

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This time, when you click Enable, the Exchange Hybrid setup wizard will start

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