On the Select Services page, use the check boxes in the Select Services section to choose the services you want to assign ...

On the Select Services page, use the check boxes in the Select Services section to choose the services you want to assign to your certificate. If you chose services during certificate creation, check boxes for these services will already be checked. You must, at a minimum, select Internet Information Services (IIS) for %BRAND_EXCHANGE_ONLINE_SHORT% 2010 SP3 servers with the Client Access server role installed. If you're following the recommended best practice of combining the Client Access and Hub Transport server roles on each %BRAND_EXCHANGE_ONLINE_SHORT% 2010 SP3 server, these services should be assigned to the third-party trusted certificate on each %BRAND_EXCHANGE_ONLINE_SHORT% server. Select Next.