Have completed the setup process, have received a confirmation email to my primary alias (original email address) from the 'outlook team'.

This message stated that my new alias had been created.

Followed instruction on how to send email from my new alias e.g.  Click on original email address immediately above the 'To' box in Outlook will show your alias immediately underneath your email address.

This did not work, my email address was completely 'dead', no link/drop-box apparent, nothing else visible on the page.

What next?