Send an email to Calendly at idpsupport@calendly.com with this message: I request a metadata file to connect ADFS with SAML SSO. NOTE: You must complete Step 1. Configure Calendly before sending a message. This step creates the IdP record in Okta.
Once you receive the metadata file from Calendly
Open Microsoft AD FS
Locate Relying Party Trusts.
Select Import data about the relying party from a file.
Navigate to Admin Center > Organization Settings > Single sign-on.
Select Enable SSO for yourself, then select Test connection. If successful, you'll see a confirmation.
In Calendly, select Enforce SAML SSO for my organization >Apply. Once SSO is enforced, all users will be logged out. They must use SAML SSO to log into Calendly. Only the organization owner can log in using their fallback (original) login method by selecting Log in using another method on the login page.