Certificates Needed for Office 365 SSO/ADFS
We are preparing to implement SSO with ADFS for our office 365 implementation but still have some confusion about the number of certificates needed.
In microsoft's recommended configuration you should have 4 servers for high availability, 2 ADFS servers (internal network) and 2 ADFS proxy servers (in DMZ accessible from internet).
I understand you need a 3rd party SSL cert installed when you create your first ADFs server. Do you then need additional certs for the second ADFS server or proxy servers?