Page Comparison

...

Tag Format: <idpui:organizationURL linkText="text" cssClass="class" cssId="id" cssClasscssStyle="style">default text</idpui:organizationURL>

...

Tag Format: <idpui:serviceContact name="text" cssClass="class" cssId="id" cssClasscssStyle="style" contactType="type">default</idpui:serviceContact>

...

• The tag <idpui:serviceContact cssId="cp"/> would return John Doe.
• The tag <idpui:serviceContact cssStyle="font-size:20px" typecontactType="technical"/> would return <a href="mailto:tech@example.edu" style="font-size:20px">John Doe<>Jane Smith</a>
• The tag <idpui:serviceContact cssClass="cpClass" name="Technical contact" typecontactType="technical"/> would return <a href="mailto:tech@example.edu" class="cpClass">Technical contact</a>
• The tag <idpui:serviceContact name="contact" typecontactType="billing"/> would return
  <a href="mailto:billing@example.edu">contact</a>
• The tag <idpui:serviceContact typecontactType="administrative">Your SP's administrators</idpui:serviceContact> would return Your SP's administrators

...

Tag Format: <idpui:servicePrivacyURL linkText="text" cssClass="class" cssId="id" cssClasscssStyle="style">default text</idpui:servicePrivacyURL>

...

Tag Format: <idpui:serviceInformationURL linkText="text" cssClass="class" cssId="id" cssClasscssStyle="style">default</idpui:serviceInformationURL>

...

This searches the <mdui:UIInfo> extension attached to the SP's {{ <md:SPSSODescriptor> for a <mdui:InformationURL/> for the browser's language. If no such entry is found then the body of the tag is inserted. Otherwise the found URL is placed inside an <a href="URL" class="cssClass" id="cssId" style="cssStyle"/>text</a> element where

...

<img src="URL" [cssId="suppliedIdIfPresent"] [class="suppliedCssClassIfPresent"] alt="suppliedText" />

Otherwise the result is the content of the <idpui:serviceLogo> element (if present).

...

If you are using Microsoft ActiveDirectory as your authentication realm, you can make use of the sub error codes that MSAD sends along with the LDAP failure code of 49.. details here. 

Direct Login Page Access

...