SEP 14 RU1: Unable to add certificate exception

Hi,

I tried to add a certificate from one of our customers in my lab but got the message that the certificate is invalid (it's definitely not expired but I guess that's not the problem...). The hash algorithm is sha384 and it was issued by an intermediate CA.

I was wondering if there are any documentaries about the requirements in order to add a certificate exception?

It did work with a certificate I issued from my lab's root CA (sha384 as well as sha1).

Thanks!