I've been looking for any documentation which suggests whether there is a way of saving Document Settings & CustomProperties such that they're automatically propagated to co-authors of the current document.
I've done some testing which suggests that's these settings aren't automatically propagated even when the document is saved. I'm also storing XML inside the document so I'm concerned that this won't be propagated as well. Since I'm doing this in Excel, I could always create a hidden sheet to store the properties in and have a watch on the table (or some similar set-up) but this isn't really the avenue I want to go down since some user could easily come along and delete the hidden sheet or manipulate its contents.
Has anyone come across this issue and managed to find a solution to it?