Hello,

 I would like to ask for a help, please. I have just installed Outlook 2019 (not 365) and I am trying to configure it for sending digitally signed emails ( exchange activesync). In every email it says digital signature is not valid (with yellow triangle alert). Certificate is installed correctly (tried it with another nonzoho email account at Outlook 2019 ( IMAP) and it is working fine. S/MIME is configured correctly as well, so I would like to ask if it is something @Zoho side. Thank you.