Jon.Lee :

 

The messenger use the UserAdapter to get the information of current user .

 

Please check the global.asax code , for example , the code :

 

  public string GetUserUniqueName() 

  {
   if(Context.User.Identity.IsAuthenticated)
    return Context.User.Identity.Name;

   return null;
  }

 

As you mention that , you find "null" user in the database ?

 

maybe you make wrong in this file . do not return string ["null"] , return [null] instead.

 

Regards , Terry .