Thank you so much for your quick response and help. I will check this tomorrow when I get back to my office. Sorry, I just left there. I doubt that they have installed any addons. I will check.

I see that in my coworkers toolbar but it is greyed out and it does not Appear on my toolbar at all. We have been trying to figure this out for sometime now.

If the ability to toggle on and off the track changes markup in Author view exists, I can't find it. It would be a nice feature to have when proofreading and editing text in the author view. If it is there already, my apologies but I can't find it. If not, I humbly request that you add it.