Currently, the @mention feature in Power Apps timeline notes does not work in environments created as CDS-only (where “Enable Dynamics 365 apps” was set to No during environment creation). This limitation persists even after manually installing Dataverse applications, as the org settings remain unchanged and feature checks rely on the initial configuration.

Impact:

Organizations that started with CDS-only environments cannot leverage @mentions for collaboration in timeline notes, which significantly reduces usability and team communication within model-driven apps.

Proposed Solution:

Introduce a way to enable @mentions in existing CDS-only environments without requiring a full environment recreation. This could be achieved by:

• Allowing administrators to toggle the “Enable Dynamics 365 apps” setting post-creation.
• Providing a migration or upgrade path that adds the necessary configuration and entities (e.g., msdyn_postconfig) to support @mentions.

Benefits:

• Improves collaboration and user experience in Power Apps.
• Reduces operational overhead by avoiding the need to create new environments and migrate data.
• Aligns with modern expectations for in-app communication features.