garr wrote:How long will it take before my full-time missionary's name shows up in our new ward's online donation area?
With no experience to go by, I would think that the Missionary Department has to begin by requesting that the Finance Department make the change, and that after they actually do it, it would take a day or two for everything to sync up again. So if the Missionary Department got the request Sunday night (Monday morning, actually), and were not too far behind and validated the change that day, and the Finance Department made the change the next day, you might see something by today or tomorrow.
I think that would be absolutely optimal, and so I would not worry about anything until a week has passed, mostly because I did not know you could make the change online. I thought you still had to call and speak with someone.
And please rest assured that your missionary will not even notice any of this. The mission president will continue to see that your missionary has the necessary funds to serve, even if it takes a short while for the Church and the wards to make the change.