D365FO LCS The authentication process was not successful. Please contact your system administrator.

While connecting to create a repository The authentication process was not successful. Please contact your system administrator.

Even if try to add new repository it will give error, like in following screenshots.

                         

                        
                       

                       



You can solve it with following steps:

1. Remove affected tokens
   The database may have affected key you need to take backup of data of this table and delete the records with following query.
   
   
   
   
   
   
2. Add new repository
   Now you can add new repository without error
   
   
   

        

         

 it will take you to login page where you will give login Id and password, or will directly sign you in if you are already signed in.

         

Hope it solves your problem. You may comment your problem as well. I faced some other issues as well which I solved but forgot to take screenshots.