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If you use Microsoft Outlook clients to connect to Microsoft Exchange Server 2007 mailboxes by using POP3 or IMAP4 protocols, Outlook clients may be unable to use the following features:
This problem occurs because Exchange Server 2007 does not support Transport Neutral Encapsulation Format (TNEF) for POP3 or IMAP4 protocols.
Update informationTo resolve this problem, install Update Rollup 2 for Exchange 2007 Service Pack 1. For more information about Update Rollup 2 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic:
Description of Update Rollup 2 for Exchange Server 2007 Service Pack 1For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
How to Obtain the Latest Service Pack or Update Rollup for Exchange 2007
After you apply this hotfix on the Exchange Server 2007 server, the following cmdlets can be used to set the message format to TNEF.
A restart of the Exchange Services or a restart may be required for changes to take eaffect. Enabling this setting may cause HTML and Rich Text Formatting to be lost when messages are retrieved by using IMAP or POP.
Transport Neutral Encapsulation Format (TNEF) is a Microsoft proprietary method for encoding Rich Text Format (RTF) messages that are sent across the Internet. A TNEF-encoded message contains a plain text version of the message, an attachment that contains the RTF version, and any OLE objects such as pictures or other attachments that were sent with the message.