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256986 Description of the Microsoft Windows registry
In Microsoft Office Word 2007, you save a document that has a digital signature in the Word 97-2003 Document (*.doc) format. However, when you open the document in Microsoft Office Word 2003, in Microsoft Word 2002, or in Microsoft Word 2000, the digital signature is lost.
Note This problem also occurs in Microsoft Office Excel and in Microsoft Office PowerPoint.
This problem occurs because the digital signature format in Microsoft Office Excel 2007, in Microsoft Office PowerPoint 2007, and in Word 2007 is incompatible with the digital signature format in earlier versions of these programs.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve the problem in Word 2007, configure the
Signature registry subkey. To do this, follow these steps:
Exit Word 2007.
Click Start, click Run, type regedit, and then click
Click the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\SignaturesNote If the Signature subkey does not exist, you must create it. To do this, follow these steps:
Right-click Common, point to
New, and then click Key.
Type Signature, and then press ENTER.
Right-click Signature, point to
New, click DWORD Value, and then press ENTER.
Right-click the new entry that you created in step 4, and then click Rename.
Type XPCompatibleSignatureFormat to name the entry, and then press ENTER.
Right-click the value, and then
In the Edit DWORD Value dialog box, type
1 in the Value data box, and then click
Note This resolution also resolves the problem in Excel and in PowerPoint.
If you save a Word 2007 document that has a digital signature in the Word Document (*.docx) format, you receive the following error message when you open the Word 2007 document in Word 2003:
This file was created and digitally signed in a newer version of Microsoft Word. The file has been converted to a format you can open, but the digital signature was lost.
The procedure that is described in the "Resolution" section does not resolve this problem.