@zeestrat-nina I've been able to get beta access for a while now and have not been able to get cert based authentication to work. For the time being I'm using SAML authentication with AAD but looking to go cert only. We are a mostly Mac shop and when I upload my cert to the MX and test computer I just get the dreaded Certificate Validation Failure.    Do you happen to have any steps, tutorials, tips, tricks or idea what I may be doing wrong?  ... View more