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How can I decrypt Outlook ActiveSync traffic?

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Karim
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Karim asked on 17 Dec 2014, 07:46 PM
I'm trying to use fiddler to debug an Exchange ActiveSync error. Unfortunately, starting Outlook with fiddler triggers an error message:
"There is a problem with the proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target site outlook.office365.com".

I suppose this is some rudimentary certificate-pinning from Outlook. How could I solve this? Would editing the name of the certificate in certmgr.msc do the job?

Thanks in advance

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Eric Lawrence
Telerik team
answered on 18 Dec 2014, 02:53 PM
I'm not aware of any form of certificate pinning in Outlook, and I use Outlook through Fiddler regularly.

Have you configured Windows to trust Fiddler's Root Certificate?

Regards,
Eric Lawrence
Telerik
 

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