External Teams federation broken after Dunloe Dataplane Service provisioning failure

Hi, since all external federation broke at once, I would check the Teams external access policy and domain allow/block list first, but this sounds more like a tenant-side provisioning or service issue than a user setting. Capture failed message timestamps, affected external domains, and any correlation IDs from Teams logs. If support already has a ticket, ask them to verify federation routing and provisioning state for the tenant, not just client cache.