Connect Microsoft 365 no longer leads to a missing page

Sharing a document by email offered to connect your Microsoft 365 mailbox, but the button landed on a "page not found" notice instead of Microsoft's sign-in. The connection could not be made at all from there, so every share fell back to explaining why it could not send in your name. The Connect button for synchronising a space with another instance had the same fault.

Both now open the sign-in they were always meant to, and bring you back where you started once you have finished. The addresses these buttons use are no longer written out by hand in each place that links to them: they come from the page that serves them, so a button and its destination can no longer drift apart unnoticed.