The use of IIS Redirects on the Base URL to point to SSO or any other URL than the Base is currently unsupported.
This causes issues with several of our integrations and can also cause bad authentications with Windows Crednetial Providers.
The integrations this will affect is as follows.
- Office 365
If you have any questions or need some help, we would be happy to assist. Open a case atkaseya.zendesk.com.