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Exchange MAPI / TNEF Question

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by jodyc

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I have a client running SBS2k and Exchange. The owners use laptops connected directly to the Internet with their own pop mail through their ISP. (And they want to leave it this way ) They are running Outlook 2K in workgroup / corp mode with InternetE-mail setup. They like to send calendar information especially meeting requests they have also sent some to us as well. We are running SBS 4.5 with Exchange 5.5. When they send the meeting request to us it just shows up in code there is no Accept or Reject buttons. When they send it to the reciepients that participate under Win2kSBS it makes it fine. However, the Accept that is sent back to them comes back in code. All 3 locations work fine when they send it to themselves. I understand this whole thing is handled via Rich Text Format or more specifically TNEF.

The problem is, where is it getting stripped out ? Is it an ISP thing or is it the Exchange servers ? Where can I check this option. I have been using Q241538 for reference.Any comments or suggestions would be appreciated.

Jody

8 replies

by ann777

The Outlook 2000 calendar is entirely different from Internet Mail Canendar or Schedule Plus.

Your Inbox doesn't know what to do with them. Exchange server shouldn't be a problem.

If you convert over to Outlook 2000, you should be fine.

by maxwell edison

When you send a clear signed S/MIME message in Microsoft Outlook Rich Text format, your recipients receive the message in HTML format.

This is by design to ensure compatibility with e-mail clients that cannot read TNEF mesages.

HTML (Hyper Text Markup Language) is an Internet-standard way of representing formatting such as bold text or colored fonts. All Web pages use HTML, as do many popular e-mail clients.

TNEF (Transport Neutral Encapsulation Format) is a Microsoft proprietary method for encoding RTF messages that are sent across the Internet. A TNEF encoded message contains a plain text version of the message and an attachment that contains the RTF version of the message along with any OLE objects that were sent with the message. Some e-mail clients do not understand TNEF encoding, and so it should only be used if you are certain the message will be received by someone using Windows Messaging, Microsoft Exchange Client, or Microsoft Outlook.

RESOLUTION:

The Microsoft Outlook Rich Text Format (RTF) provides the necessary TNEF formatting to ensure that the attachment is intact.

To enable TNEF, use Microsoft Outlook RTF as the default sending message format for each mail message that will contain Outlook items as attachments. To do this, follow these steps:

On the Tools menu, click Options.

On the Mail Format tab, click Microsoft Outlook Rich Text in the "send in this message format" list, and click OK.

On the File menu, point to New, and click Mail Message.

On the File menu of the new message, click Properties. Ensure that "Send in Microsoft Outlook Rich Text Format" is checked, and click OK.

On the Insert menu, click Item, select the items you wish to include as attachments,and click OK.

Maxwell

by jodyc

Thanks alot. I will look into that further on this end Very through answer.

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