I assigned:
- A new activity to a resource.

Question 1
On the "Today" page of the resource, the new activity will be displayed automatically without having to log out ?

YES

Question 2
Immediately ?

YES, and no : the user has to refresh the today page...

Question 3
After an adjustable time?

NO, no delay, only refresh of page needed (re-select today in the menu)

Question 4
Should I, previously, perform a specific configuration in the tool ?

NO, nothing

Question 5
Does the automatic update also works for the projects ?

THIS IS THE INTERESTING QUESTION.
In fact all the above questions were already working for activities.
Since the invention of Today page...
What is new is the automatic refresh of projects and projects data.
Previously to V4.0.0, if Project leader affected resource A to Project A, the resource could not directly see Project A and its data.
Disconnection / reconnection was needed.

So to reply to same questions about projets, after affectation of a resource to new project :

Question 1
On the "Today" page of the resource, the new project will be displayed automatically without having to log out ?

YES !!!! (and this is new)

Question 2
Immediately ?

NO, after a short delay

Question 3
After an adjustable time?

YES, after the "delay (in second) to check alerts" defined in Global parameters screen.

Question 4
Should I, previously, perform a specific configuration in the tool ?

NO

And the other new functionality, is that the project selector list will also be automatically updated : the resource will have possibility to select new project without need to disconnect / reconnect.