If I click the Change Settings button and then click on the button to choose a Signing Certificate then I get an error message statiing No Certificates Available.Īt File/Options/TrustCenter/Trust Center Settings/Email Security when I click on Import/Export Digital Certificates and attempt to Export your Digital ID to a file by clickiong on Select. If I attempt to change the security setting from Automatic to one of the account- specific S/Mime Settings the Invalid Certificate message immediately pops up again. When I click on Automatic I can see all three mail accounts listed in the form My S/Mime When I click on Change Security Settings button I see that Add digital signature is checked (as it should be). Two days ago I started getting an Invalid Certificate message (Microsoft Outlook cannot sign or encrypt this message because there are no certificates which can be used.) for every email I sent from each of the three accounts. All three certificates are valid until 2020. I have been using these certificates with these accounts since April, signing all messages andĮncrypting messages from one account. I have three digital certificates from Comodo, one for each account.
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