In D2L, faculty and students can export Discussion Posts.
For faculty, this may be useful for your own records or for departmental purposes.
For students, it may be useful to keep a history of what was said in a previous course.
To export Discussion Posts, you will need to activate the Discussion Grid View first. Then, you can export either all Discussion Posts or specific posts.
For more tutorials on D2L, check out the D2L Self-paced Training for Faculty and Staff Wiki page.