Thanks for your feedback! Just a note to let you know that we’re building your suggestion now. We plan to increase availability to this feature as we continue improving the tech, and ensuring a smooth experience across Office 365 following the URL changes in SharePoint Online.Ben commented
is there any eta for this feature? my business is merging with another business and we want to use an existing tenant as there is a large number of integration's within that tenant we dont want to lose. Being able to rename the SPO tenant domain would be extremely useful.