Remote Desktop Services - Remove Certificates

Hi!

I have had a functioning Remote Desktop Services infrastructure up until I had to renew my RD Gateway certificate. I think I may have been in a coma because I managed to Select the same certificate for all the Role Services:
1. RD Connection Broker - Enable Single Sign On
2. RD Connection Broker - Publishing
3. RD Web Access
4. RD Gateway

I only have one certificate for my external domain name: rdp.my.domain and I understand that this certificate cannot be used for alle the roles.

What is now happening is that whenever i try to open a RemoteApp, I get this error message:

"Certificate Errors [...] The certificate is not valid for this usage."

Can anyone provide info as to how to remove the certificates for roles 1 and 2? I guess that this is where the error happens. I have no certificate errors when accessing the RDWeb page.

Thanks for any help!