The server [roaming.officeapps.live.com] requests a client certificate

[ohad]

Sometimes fiddler would pop up the following message:

Client Certificate Requested

---------------------------

The server [roaming.officeapps.live.com] requests a client certificate.

Please save a client certificate using the filename:

C:\Users\ohads\Documents\Fiddler2\ClientCertificate.cer

Looking this error message up in the internet led me to the following article:

http://fiddler2.com/documentation/Configure-Fiddler/Tasks/RespondWithClientCert

I understand how, given a PFX file, I can import it to my certificate store, and subsequently export it to a CER file in my documents folder.

What I don't understand is where I get the PFX file to begin with...

Thanks,

Ohad

[EricLaw]

In general, servers that request client certificates for HTTPS are directly visited by the user (e.g. banks) or are configured within an enterprise environment.

For whatever reason, the Office2013/Office365 guys decided that they'd try to collect a client certificate when the Office client performs background tasks against the Office Live servers. That results in this prompt, which can be safely ignored.

If you don't care about traffic to that server (and you probably don't) you can add an exemption for the roaming.officapps.live.com server on either the HTTPS or CONNECTION tab inside Tools > Fiddler Options.