This question has ben asked before but yet never answered. I have set up my Outlook 2016 with three different Mail accounts:
firstname.lastname@example.org (commertial, office365) email@example.com (personal, outlook.com account) firstname.lastname@example.org (another company, office365)
The commertial account
email@example.com now requires that the outgoing mails are signed with a S/MIME certificate.
So I set up a certificate from COMODO, imported that into the trust center in outlook and everything seems to work fine.
The problem now is that the other two accounts
firstname.lastname@example.org dont need to be signed. Since I ticked the option "add digital signature to outgoing mails" in the trust center, outlook thinks I want to add a digital signature to every mail of every account. So it pops up a prompt everytime I want to send a mail from one of those two unsigned accounts. Setting it up to send it unsigned will send the mail, altough it wil promt it again the next time.
One option would be to untick "add digital signature to outgoing mails" in the trusting center but then the signing-option is turned off for the signed account. Ticking it for every mail manually is very unhandy...
So is there a way to set up outlook to ignore the signature for the two unsigned accounts or to tick the signing for outgoing mail from one single account by default?