Few months ago (in April 2023), Microsoft has announced that all Office 365 related services will use a unified cloud.microsoft domain (see https://blog.hametbenoit.info/2023/11/16/azure-virtual-desktop-a-new-application-preview/).
Well, these services have started to be transitioned to this new unified domain:
- Microsoft Service Health Status is now https://status.cloud.microsoft/
- M365/Office 365 Setup is now https://setup.cloud.microsoft/
- M365/Office 365 Administration Center is now https://admin.cloud.microsoft/
Other services will gradually be transitioned over time.
Keep in mind that new services will immediately start using the unified domain.
You may have to update your firewall/proxy rules to allow these new URLs.
For a transitioning period of time, current URLs will continue to work and will soon have a redirection in place.