Outlook Certificate Autodiscovery Error Fix

Outlook Certificate Autodiscovery Error

Introduction If you are using Microsoft Outlook client to retrieve your Microsoft based email, then you may have started to receive an error about the certificate not being valid. The pop up alert that you receive may look something like this: The reason for this seems to be that Microsoft are now using outlook.com for […]

By Andrew Armstrong • 2 min read

Introduction

If you are using Microsoft Outlook client to retrieve your Microsoft based email, then you may have started to receive an error about the certificate not being valid. The pop up alert that you receive may look something like this:

The reason for this seems to be that Microsoft are now using outlook.com for their certificate:

So whats the fix?

Looking for answers from Microsoft, we have gathered that (surprise, surprise) there was a cock-up and the older email domains of:

@hotmail.com
@live.com
@msn.com
@passport.com
@passport.net

had not been correctly allocated to a certificate. This issue has supposedly been rectified now, however, if you are still getting this issue, the advice is to ensure that all your Windows and Office updates are fully installed and up to date and it is still persists, delete your email profile (Control Panel > Mail) and re-enter it.

Comments

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Andrew Armstrong

Andrew Armstrong is a UK-based IT professional with 26+ years of hands-on experience in Windows, Windows Server, SCCM/ConfigMgr, Active Directory, PowerShell, and enterprise infrastructure.

He founded TechyGeeksHome in 2010 and has published over 1,500 practical guides covering real-world IT problems and solutions. When not solving IT problems,

Andrew develops free Windows utilities including Ultimate Settings Panel, which has been downloaded over 850,000 times.

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