AIA and online responder

http://technet.microsoft.com/en-us/library/cc770413(WS.10).aspx

configure the CAs to include the Online Responder's URL as part of the authority information access extension of issued certificates. This URL is used by the OCSP client to validate the certificate status.

To configure the authority information access extension

1. Open the Certification Authority snap-in, right-click the name of the issuing CA,and then click Properties.
2. Click the Extensions tab.
3. In the Select extension list, click Authority Information Access (AIA) (Figure 11), and then click Add.