Hi,
I'm trying to setup email encryption with Outlook 2010. I have a certificate of the person I'm trying to communicate securely with, in .cer format. I've created an address book entry with his email and certificate in it. I've also created my own certificate and sent it to him in .cer format. In addition, I've added myself in the address book with my email and certificate in the entry.
I'm able to send signed/encrypted emails to myself. However, when I try to do the same to him, I get a popup dialog that says:
Microsoft LDAP Directory - Bad search filter
Once I click on the OK button, this popup dialog shows up
Encryption Problems - Microsoft Outlook had problems encrypting this message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities:
<Recipient>
Continue will encrypt and send the message but the listed recipients may not be able to read it.
The "Continue" button is greyed out.
What am I doing wrong? Thanks!