As announced in April 2023 (Office 365 – New unified domain for Office 365 services), Microsoft has been unifying Office 365 services under the cloud.microsoft umbrella domain.
Well, the transition process is in full swing and today a new service is transitioning: Exchange Online Outlook Web Access.
Outlook Web Access URL is switching from https://outlook.office365.com/ to https://outlook.cloud.microsoft/
As always, there will be an interim period during which both URL’s are active, then an automatic redirection will be implemented before fully deprecating the https://outlook.office365.com