Forum Discussion

Mali_Stane's avatar
Mali_Stane
Copper Contributor
Jul 14, 2020

OWA Multiple SMIME certificate : How user can chose correct certificate in OWA

Hi, I hop this is correct forum. User has two SMIME certificate. When sending email he can chose with which certificate will he sign the email. Under OWA I don see this option. Under S/MIME user ...
exchange
hybrid
office 365
chrismholmes's avatar
chrismholmes
Copper Contributor
Sep 17, 2020

Mali_Stane 

I am in the exact same boat! While I can uncheck the automatic option, nothing I chose seems to work. If my user's email address or (proxy addresses) match their certificate, the automatic configuration works, however, nothing else seems to.

 

If you have a user where the certificate Subject Alternative Name does not match the users email address or any of their proxy-addresses, then you can not select a certificate. (While, Outlook with a quick change will allow this all day long. So thankfully that still works.)

 

I have thought maybe the following items would help:

-OWASenderCertificateAttributesToDisplay
-OWAUseSecondaryProxiesWhenFindingCertificates

 

The real problem is I can not figure out what the right values for OWASenderCertificateAttributesToDisplay actually are!

and I think the second setting (OWAUseSecondaryProxiesWhenFindingCertificates) is not compatible with it in the first place. (Please note this is only a theory)

 

I am at my Wits end!

 

If anyone could give me a clue as to the right value for OWASenderCertificateAttributesToDisplay, I will forever be in your debt.

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