If you require access to the FastClose Server Admin app but
Have yet to configure your SSO for FastClose
Have misconfigured your SSO
Have not created any users yet
The external Identity Provider is inoperative
Then you can still sign in to the Admin web app using a username and password by visiting the Password Sign-in page, providing it is enabled:
http://fastclose.server:5101/SingleSignOn/PasswordSignIn
For FastClose version 3.3+ the URL is http://fastclose.server:5101/SingleSignOn/Help

There is always an account with username Administrator available that you can use to login. The default password is available from FastClose Support, if you never changed it.
In Windows Explorer, browse to the FastClose Server install folder. Edit the file appsettings.customer.json using Notepad, run as administrator. If this file does not exist, create it by copying and renaming the file appsettings.customersettings.json.
Within that file, change the value of EnablePasswordSignInOverride to true or false:
{"AuthenticationOptions": {"EnablePasswordSignInOverride": true}}
Restart FastClose Server.
We recommend you disable the Password Sign In page after you have successfully configured Single Sign On.