Removing onmicrosoft.com from M365 usernames needs sifoidak.com verified as a custom Entra domain, which needs a DNS TXT record at GoDaddy. Mike confirmed ACG has no registrar access to that account, so UPNs stay on sifoidak.onmicrosoft.com and new users follow the same convention. Recorded as decided rather than blocked so it is not re-proposed. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>