Hi, we're testing a move from exchange 2016 to OSX Server 5.1 to reduce monthly lic. coasts. When we used FreeBSD with Davical and usual Postfix setup or Exchange - we had additional option in the mail menu on iOS to enable SMIME signature/crypto. If I setup a new account on iOS, there's no option to enable this. If I setup this account as a usual IMAP account, I'm able to activate this one... Any hint on this? Thanks.