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Question

Microsoft 365 support

They can forcibly remove the federation if the domain is orphaned.

Here is the exact wording to give them:

“The domain london-oratory.org is still federated with RM Unify in Microsoft Online Services. This is causing Microsoft 365 apps to redirect to RM Unify during authentication. Please remove the federation or convert the domain to ‘Managed’ in Azure AD.”

They will know exactly what this means.

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Moved from: Microsoft 365 and Office | Office Online Server

Answer 1

Hello @Carlos Kinsky,

Welcome to the Microsoft Q&A forum.

Thank you for reaching out and for sharing the initial details of your situation. According to the message you shared, your domain is still configured as Federated, which explains why users are being redirected to RM Unify whenever they attempt to sign in to Microsoft 365 services. This is the expected behavior for federated domains, as authentication is handled by the external identity provider.

To better understand how to support you, I would like to clarify your intended outcome.

• Are you planning to remove the federation so that users can sign in directly with Microsoft 365 using only their Microsoft 365 username and password?
• Or are you still using RM Unify and facing issues with the current authentication flow?

Your preference will help determine the correct next steps, whether it’s guiding you through converting the domain to Managed or addressing any authentication issues related to RM Unify.

Please share more details about your goal, and I will do my best to assist you further.

Answer 2

The wording that's provided is appropriate to give to Microsoft 365 support when requesting that an orphaned federated domain be converted back to a managed domain. It clearly states:

• Which domain is affected (london-oratory.org).
• That it is still federated with a third-party IdP (RM Unify) in Microsoft Online Services.
• The impact (Microsoft 365 apps redirect to RM Unify during authentication).
• The required action (remove the federation or convert the domain to Managed in Azure AD/Microsoft Entra ID).

This aligns with documented scenarios where incorrect or incomplete federation configuration prevents users from signing in or causes misdirected authentication, and where Microsoft Support may need to intervene to reverse or fix federation settings.

To proceed, contact Microsoft 365/Microsoft account support (for example via the “Contact – Microsoft Support” or “Get Help” flows described in the references) and provide that exact text in the case description or to the support agent. Support can then validate domain ownership and adjust the federation status as requested.

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References:

• Users can no longer sign in after you run the Convert-MSOLDomaintoFederated command to convert an existing domain
• Troubleshoot account issues for federated users in Microsoft 365, Azure, or Intune
• Migrate from federation to cloud authentication
• The domain is a federated domain but the user <User>@contoso.com is not known by Office 365
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