Hello and apologies for the late reply. If you have Office 365 I understand there are plugins that add MS functionality to Moodle -there is more information here
I haven't used them myself but when I have got students to annotate Word documents or work collaboratively on a Word document I have just added its online link into a Moodle course (as with Google docs) and sent them to the course to access the document there. Not technically what you want I think but it works. Likewise students share the link to their Word doc with their teacher within an assignment so the teacher can access the doc to annotate it and then add the grade in the Moodle assignment.
Would you be able to give details of the old plugin for Word 2007 and also do you have any links showing how Canvas can do this- I'd be interested to know.