PGP Corporation is pleased to announce compatibility with the new Microsoft Exchange Server 2007. PGP Desktop 9.6 and above provide support for Microsoft Exchange Server 2007 and Microsoft Office 2007. When used with Internet-standard PGP/MIME (RFC 3156) messages, PGP Desktop solutions preserve full message fidelity for all secured messages.
With Exchange Server 2007, Microsoft has introduced a change in functionality that converts all messages to its internal MAPI format immediately upon processing unlike previous versions of Exchange that supported the MIME standard for email. When both sending and receiving via non-MAPI clients, Exchange Server 2007 destroys MIME structures in email. However, PGP/MIME-encoded messages are fully compatible with this Microsoft transition even when MAPI is not in use. All messages sent between PGP Corporations MAPI clients are also fully compatible.
Since Exchange Server 2007 alters messages by removing MIME structures, note that messages encoded using the legacy "PGP Partitioned" format may not always display HTML message content properly, and foreign character sets in such messages may not reproduce correctly when processed through Exchange Server 2007. If such messages are processed from non-MAPI clients, the server may delete some encrypted HTML body parts and remove non-ASCII character set information, resulting in messages that do not preserve full fidelity.
If your organization currently uses the legacy PGP Partitioned encoding with non-MAPI clients, or you generally receive legacy PGP Partitioned messages over the Internet, PGP Corporation recommends not upgrading to Exchange Server 2007 at this time. PGP Corporation is working with Microsoft on additional compatibility solutions between Exchange Server and the MIME standard. PGP Corporation will update this note as more information becomes available.