When selecting Mail Link to this Page from mobile Safari, no Exchange address groups are available when attempting to insert a recipient ("Choose a contact to mail").
Also, Outlook Personal Contacts are listed as part of the displayed All Contacts view, but not the Global Address List group. Contrast this with the mail-link case with Photos (native app) or Mercury browser.
Thank you.
ATT iPhone 4, iPad 1, iOS 5.0.1, 3G, WiFi