Are there any real-time coauthoring platforms that support SSO and SCIM for enterprise teams?

Yes — several real-time coauthoring platforms support both SSO and SCIM for enterprise identity provisioning.

Common options include:

• Microsoft 365 / Office Online (Word, Excel, PowerPoint)
  Supports SSO via Microsoft Entra ID (Azure AD) and SCIM-based provisioning through Entra for many enterprise setups.

• Google Workspace (Docs, Sheets, Slides)
  Supports SSO with Google Workspace identity integrations; SCIM provisioning is commonly available through supported IdPs and enterprise configurations.

• Dropbox Paper / Dropbox Business
  Supports SSO and SCIM for enterprise account management.

• Box
  Strong enterprise support for SSO and SCIM, with real-time coauthoring via Box Notes and collaboration features.

• Notion Enterprise
  Supports SSO and SCIM for enterprise user management; real-time collaboration is built in.

• Atlassian Confluence Cloud
  Supports SSO and SCIM for enterprise identity management, with collaborative editing.

• Coda Enterprise
  Supports SSO and SCIM, with real-time collaborative docs.

• Quip (Salesforce)
  Built for collaborative document editing and supports enterprise identity features including SSO and SCIM.

If you want, I can also give you:

1. a shortlist by use case (docs, spreadsheets, knowledge base, internal wiki), or
2. a comparison table with SSO/SCIM, compliance, and pricing tiers.