In order to open or save files using the Thru Add-In for Office 365, you will first be prompted to log in to your Thru site.
There are two forms of login you can choose from: Password-based or Single Sign On (SSO).
For password-based login, fill in the URL of your Thru site and enter your username and password. If you never received information about your Thru site URL or were not issued a Thru account, contact your company’s Thru administrator. If you forgot your password, enter in your Thru site URL and select Forgot Password from the login screen.
Single Sign On (SSO)
If your company has Single Sign On enabled for this add-in on your network, it only requires you to enter your Thru site URL. Contact your Thru Administrator if you need help logging in using Single Sign On.