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Invitation sent to an external domain

AI summary

A ChatGPT invitation policy detects when invitations go to addresses outside your tenant, creating workspace members your directory cannot govern. Review these to verify external access is intentional and has a defined end date, particularly for contractors or partners.

Severity: Medium External Access Recommended Preview

What it detects

Detects invitations to addresses that match no Entra ID user or match a guest.

Why it matters

An invitation to an address outside the tenant creates a workspace member the directory will never govern. Sometimes that is deliberate - a contractor, a partner - but it should be a decision rather than a side effect, and it should have an end date. An address counts as outside when no Entra ID user carries it as UPN or mail, or the user carrying it is a guest, so this needs the Microsoft 365 Users inventory scanned in the same environment: without it every invitation matches.

The rule

Every ChatGPT Invitation where External Domain is true

In Rencore Governance

The Invitation sent to an external domain policy in Rencore Governance: the rule, its trend and the objects that match it
The policy page in a Rencore demo Environment, captured October 2026.

Details

Applies to ChatGPT invitation
Connector ChatGPT Enterprise
Severity Medium
Category External Access
Recommended Yes
Recommended automation None
License type Standard

Other policies that check ChatGPT invitation objects:

Frequently asked questions

What does the invitation sent to an external domain policy detect?

The Invitation sent to an external domain policy detects invitations to addresses that match no Entra ID user or match a guest.

Which objects does the invitation sent to an external domain policy check?

The Invitation sent to an external domain policy checks ChatGPT invitation objects from the ChatGPT Enterprise inventory and reports each one that matches its rule as a violation.

How severe is a violation of the invitation sent to an external domain policy?

Violations of the Invitation sent to an external domain policy have Medium severity. The policy is in the External Access category.

Which module includes the invitation sent to an external domain policy?

The Invitation sent to an external domain policy comes with the ChatGPT Enterprise connector (in preview) in the AI & Agents module of Rencore Governance, an add-on module on the Premium and Enterprise Plans.