Microsoft KB Archive/178241

= XCLN: Adobe Acrobat PDFs Encoded in Different Formats =

Article ID: 178241

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Outlook, Exchange Server Edition
 * Microsoft Exchange Client 4.0
 * Microsoft Exchange Client 5.0
 * Microsoft Exchange Client 5.5
 * Microsoft Exchange Client 5.0
 * Microsoft Outlook 97 Service Pack 1
 * Microsoft Outlook 97 Service Pack 1
 * Microsoft Outlook 97 Service Pack 1
 * Microsoft Outlook 97 Standard Edition

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This article was previously published under Q178241



SYMPTOMS
When you send an Adobe version 1.2 Portable Document Format (PDF) file (created by Adobe 3.0 Writer) as an attachment with an Exchange client, the attachment is encoded as "quoted printable." However, a version 1.1 PDF file will get encoded as "base64."

PDF files (Adobe Portable Document Format) are the format in which documents are saved for viewing and transfer by Acrobat Reader and Acrobat Exchange for Macintosh and Windows. The encoding from the Microsoft Exchange client is determined based on the first 4 KB content of the attachment. Adobe changed the format between versions 1.1 and 1.2 PDF files. The 1.1 PDF version is based on Base64 encoding; the version 1.2 PDF is based on quoted printable encoding.

If the receiving system is not capable of understanding the "quoted printable" encoding, it may cause problems.



WORKAROUND
If the customer system is incapable of handling "quoted printable" encoding, use only version 1.1 PDF files. Another possible solution is to compress the files before sending them with a third-party compression utility such as Winzip.

For additional information about workarounds, please see the following article in the Microsoft Knowledge Base:

182307 XADM: Text Attachments Appear Corrupted

Additional query words: XCLN Adobe PDF Attachments

Keywords: kbbug kbnofix KB178241

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