How can redirect an external user after he login on the in Dynamics 365 web page .
I want to redirect the user to another web page to create manually a user and assign the right to create ticket.
First of all, which of the many products from the Dynamics 365 suite are you talking about? Is it about Dynamics 365 for Finance and Opeations (Dynamics 365 Finance and Dynamics 365 Supply Chain Management after the last name change)? If it is, let's continue...
Can you explain your requirement, please? Why do you want to create a user if the logic should run after the user logs in (therefore it already exists)? If you want to create an F&O user, shouldn't you do in in F&O? And if it's not related to F&O, why the user must log into F&O and then be redirected somewhere else? It sounds very strange, at least without understanding the underlying business requirement.