Domain not routing mail or logins correctly after tenant transfer

Hello

Please i need your help on this issue.

Domain not routing mail or logins correctly after tenant transfer.

I recently removed the domain sustainable.XXXX from an old Microsoft 365 tenant (based in Chile) and added it as the default domain in my new tenant (based in Spain). The domain is showing as Authoritative and in a healthy state in the Microsoft 365 Admin Center. DNS records (MX, SPF, CNAME autodiscover) are all configured correctly and propagate globally (checked with multiple DNS tools).

 However, I am still experiencing two critical issues:

 Authentication / Login Redirect.

 When I try to log in with rphilippe@ sustainable.XXXX in Office apps (desktop and mobile), the login is automatically redirected to the old Chile tenant (…onmicrosoft.com), which no longer has my domain or licenses.

This prevents me from signing into Office apps with my licensed email address in the new Spain tenant.

Mail Flow – No Inbound Delivery

I can send outbound emails from rphilippe@ sustainable.XXX without problems.

But inbound emails from Gmail/Yahoo do not appear in Message Trace in Exchange Online.

 This indicates that messages are not reaching my new tenant at all, despite correct MX records.

Steps already taken:

1. Removed domain completely from old tenant.
2. Verified domain ownership in new tenant.
3. Configured all required DNS records at my registrar (Wix).
4. Waited more than X hours since DNS propagation completed (global MX records confirmed).
5. Tested with Message Trace and Quarantine: no trace of inbound messages.

Request: Please verify and force a refresh of Home Realm Discovery (HRD) and Exchange Online domain routing for sustainable.XXX, to ensure:

 Authentication requests for @ sustainable.XXXX point to the correct (Spain) tenant.

 Inbound email is routed correctly to the new tenant.

 This appears to be an internal Microsoft propagation/cache issue, not a DNS or local client issue.