yes there is.
You can simply solve this with a redirect rule - if you’re checking for the session cookie of Zammad, you can redirect to wherever you want to. This should be exactly what you need (at least in SSO context that is the way to do it).
You can find a working comment here:
( Please do not respond to the issue because you’d mix things )
Please note that this redirect only works on a clean start of your Browser.
As soon as you logged out, the Session cookie is still there. It is removed upon Browser restart.
Edit: Redirect to the auth URL of Zammad for the service you want to use - e.g. office 365:
Please note that this only works for one provider, as nobody is able to forsee what authentication provider should be used (if several applicable)