Cloud computing · Identity & access management · 3 min read
Extending Your IAM to Cloud Apps: SSO, Provisioning, Reviews
Short answer
To bring cloud apps under your IAM, inventory them, connect each to your identity provider with SAML or OpenID Connect, automate account lifecycle with SCIM or connectors, run regular access reviews, and stream sign-in logs to a central place.
Key takeaways
- Start with an inventory: you cannot govern apps you do not know about.
- SSO without automated deprovisioning still leaves orphaned accounts, API tokens and shared links behind.
- Prioritize apps by data sensitivity and user count, not by how easy the integration is.
Every company now runs dozens or hundreds of SaaS applications, and many of them arrived without IT's involvement. Each one is a place where accounts, permissions and data live. The goal of extending IAM to the cloud is simple to state: the same joiner, mover and leaver process, the same strong authentication and the same visibility for every app.
Where do I start?
With an inventory of every cloud application in use, who owns it, what data it holds and how users sign in today.
Sources for the inventory: your identity provider's app list, expense reports and card statements, browser extension or network logs, and simply asking each department. For each app, record the business owner, data classification, number of users, sign-in method (SSO, local passwords, social login) and whether it supports SCIM.
How do I connect apps to single sign-on?
Configure each app as a SAML service provider or OpenID Connect client of your identity provider, then enforce SSO so local passwords stop working.
- Exchange metadata: the IdP's entity ID, SSO URL and signing certificate go to the app; the app's entity ID and Assertion Consumer Service URL go to the IdP.
- Decide the user identifier. Use an immutable ID where possible; email addresses change.
- Map attributes: name, email, groups or roles the app needs.
- Test with a pilot group. Decode a test assertion with the SAML Decoder to confirm the audience, recipient and attributes.
- Enforce SSO and disable local login for everyone except a documented break-glass admin.
Why is provisioning as important as SSO?
Because the riskiest moment is when someone leaves, and SSO alone does not remove their account, tokens or data shares.
SCIM 2.0 (RFC 7643 and 7644) gives a standard REST interface for creating, updating and deactivating users and groups. Your identity provider or governance tool acts as the SCIM client and the app as the server. Where an app lacks SCIM, use its admin API, a connector from your IGA product or, at minimum, a manual offboarding checklist with an owner and a deadline. The provisioning guide covers SCIM in detail.
How should access reviews work for cloud apps?
App owners confirm, on a schedule, that each user still needs their access and level, with removals carried out automatically.
Quarterly reviews for sensitive apps and annual for the rest is a common rhythm. Make reviews small and specific: "Does Alex still need admin in the billing system?" works better than a spreadsheet of 4,000 rows. Track privileged roles separately.
What about apps that will not integrate?
Rank them by risk, push vendors for SSO and SCIM, and use compensating controls for the rest.
| App situation | Approach |
|---|---|
| Supports SAML/OIDC and SCIM | Full integration, enforce SSO |
| SSO only | Integrate SSO, automate deprovisioning via API or checklist |
| SSO on a higher plan | Business case based on risk and admin effort |
| No SSO at all | Password manager, MFA, named owner, quarterly review |
| Unknown or unsanctioned | Assess, then integrate, replace or retire |
How do I keep visibility?
Collect sign-in events from your IdP and admin events from key apps in one place, and alert on the unusual.
Sign-ins from new countries, admin role changes, mass downloads and new OAuth app consents are worth alerting on. Third-party OAuth grants deserve special attention: a user who connects a marketing tool to their mailbox has granted an outside party access, often without any review. Many identity providers can restrict which apps users may consent to.
Questions
If an app has SSO, do I still need to deprovision accounts?
Yes. A departed user cannot sign in through SSO, but the account may still own API tokens, scheduled jobs, shared files or a local password. Remove or disable it through SCIM or the app's admin API.
What if a SaaS app only supports SSO on its enterprise plan?
This is common. Weigh the upgrade cost against the risk and the manual effort of managing passwords and accounts. For small, low-risk tools, a password manager with shared vaults and a documented offboarding checklist may be a reasonable stopgap.
Sources
Tagged: Cloud, Single sign-on, Provisioning, SCIM, Federation, IAM