Disable sending mails if no valid certificate was found

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Disable sending mails if no valid certificate was found
Niels Ziegler

Posts: 49
Joined: 2017-02-03
I am using the ItemSend event for handling recipient certificates. This works pretty well so far. But there can be an issue with a user, where I find a certificate, but it is actually not valid.
When I give control back to Outlook after the ItemSend event, it will check that certificate and show a dialog:
"Microsoft Outlook had problems encrypting this message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities"

It then allows me to "send unencrypted". Is there a setting that will disable this option? I do not want the user to be able to send the mail unencrypted.
Posted 10 Jul, 2017 04:07:05 Top
Andrei Smolin

Add-in Express team

Posts: 15583
Joined: 2006-05-11
Hello Niels,

If such an option exists, it is listed at https://technet.microsoft.com/en-us/library/cc179034(v=office.12).aspx.

Regards from Belarus (GMT+3),

Andrei Smolin
Add-in Express Team Leader
Posted 10 Jul, 2017 06:37:43 Top