Converting Cross-References to Fields Is Impossible
What happens: The “Convert to Fields” button in the Cross-References view (see Working with Cross-References to learn more) is disabled, even though your document includes cross-references.
What this means: It’s possible that cross-references already use fields. It’s also possible that cross-references are not convertible to fields. For a cross-reference to be convertible to a field:
The item to which the cross-reference refers must be known (see Managing Cross-References to learn how to find cross-references to unknown items)
The item to which the cross-reference refers must use multilevel list numbering (search for “multilevel list” in Word Help to learn more)
The cross-reference must include full context or no context (for example, Section 3.1(d)(i) or clause (i), not clause (d)(i))
What you should do: Make sure that cross-references consist of text instead of fields, that the items to which cross-references refer are known and use multilevel list numbering, and that cross-references include full context or no context.
As an alternative to using Contract Tools to convert cross-references to fields, you can use Word’s built-in controls; search for “cross-reference” in Word Help to learn how.