The Reporter does not care what version of Word is used for the Letters and Envelopes templates, but Word won't open a document saved from a newer version without a converter. There are a couple of ways to deal with Microsoft Word's incompatibility between different versions.
One way for users of different versions of Microsoft Office to share documents is for the computer with the older version to download and install a converter from Microsoft.
When a user with Word 2007 adds a template into the Reporters Letters and Envelopes templates, and then a Word 2003 user tries to open it for editing in Word, after the hour glass spins for a while, Internet Explorer opens to the Office Compatibility Pack page. That user can download the converter to let Word work with the newer version document.
Close this error message which appears underneath the browser back in the Reporter. It won't appear again after the Word converter is installed.
To use the Reporter's templates, you need to save the file type during the procedure when renaming a sample template to .doc, instead of the default .docx.
One way for users of older Office and Office 2007 to be compatible on the same Reporter Shared Documents templates is for the Word 2007 user to save new templates as .doc instead of .docx.
Some people change the default format for saving all Word documents: