Is it possible to configure Oauth based login in AEMaaCS for authors

Hi ​@urvashiagarwal 
 

Yes, OAuth works in AEMaaCS for authors, but you'll configure it differently:

• Keep using Azure AD for user authentication
•  Add Adobe IMS as the OAuth broker
•  Configure federation in Adobe Admin Console
•  Don't try to configure OAuth directly in AEM

The user experience remains the same (SSO with Azure AD), but the technical implementation changes to comply with AEMaaCS architecture.
https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/security/ims-support
https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/security/setting-up-ims-integrations-for-aem-as-a-cloud-service
https://learn.microsoft.com/en-us/entra/identity/saas-apps/adobe-identity-management-tutorial
 

Thanks

Hi ​@urvashiagarwal 
 

AEM as a Cloud Service supports OAuth-based authentication for AEM APIs and integrations, but it does not support direct OAuth/OIDC login to the AEM Author UI.

For the AEM Author service, Adobe documents the supported options as:

• Adobe IMS authentication — the standard author login mechanism.
• SAML 2.0 through Adobe IMS — for federating Adobe IMS with a customer identity provider such as Microsoft Entra ID/Azure AD.

Adobe's authentication matrix explicitly lists OAuth as unsupported for direct AEM Author login, while listing Adobe IMS and SAML 2.0 via Adobe IMS as supported for Author.
Sources:

• AEM as a Cloud Service authentication
• IMS Support for Adobe Experience Manager as a Cloud Service