Exchange: OWA displays all mailboxes in a directory browsing format

Problem: After some unrelated changes are made to IIS 6.0, Exchange’s Outlook Web Access (OWA) acts differently. The normal login page is replaced by a login dialog box. After logging in, OWA displays all the mailboxes in a browseable directory format instead of the normal OWA content. You can select your mailbox and all folders display in the same manner. Charles Yang from Microsoft presented a solution that (mostly) worked for me in this situation.

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