Treasury trainings have a new login interface. After clicking the link, you will see an IU branded sign in field that requires your IU username, followed by @iu.edu. It is important to use @iu.edu instead of @indiana.edu, @iupui.edu, @iun.edu, etc. After you enter your @iu.edu address, then click the Next button.
Next enter your network password at the IU branded sign in asking to "Enter password" and then click the Sign in button.
Finally, complete the login by submitting DUO push or token and you will then be forwarded to the new SharePoint Online site.