How to change the Welcome (login) page

[Yudai Yamamoto]

Hello, everyone.

I am having trouble logging in an external user.

I want external users to access specific pages only when they log in for the first time, and to access the normal Homepage after the second time.

The external user registration plug-in is not available because the external authentication system is used to determine the permissions.

If you have any ideas, please let me know.

[The Machine]

Sounds like you need to do a combination of an installation exit and a user preference of some sort that tracks if its their first time and then set to false once that page has been loaded.  Something to that effect.  

Good luck.