I just want to know if it is possible that two or more users will be able to fill out a single form at the same time.
For example: When the first user updates and saves the form, the second user will get the updates, including those updates that he made upon refreshing of the form.
As long as the saves are not interwoven then you can do this eg Person 1 fills in the form, saves and then Person 2 opens the saved form from the resume link, fills in and saves the form and then Person 1 reloads the form from the resume link and so on.
While this is possible, the form fillers would need to be careful to avoid data loss due to reloading with unsaved data in the form.
We have specific functionality that if two people have the same form transaction open then the first person to save will be able to save the form from then and the second person will get an error when the form attempts to save, due to background saves or specific save actions.
Thanks for your answer Glenn