Microsoft adds support for sending emails via alias email addresses (also known as aliases or proxy addresses) from the Outlook email client for Windows.
"Send email from a proxy email address or an alias account, not from your primary email address," says Microsoft.
"The alias email address will be maintained in FROM and REPLY TO for recipients."
Select an email alias from a drop-down menu
Once the feature is released, users will be able to send messages through Outlook for Windows using any alias previously configured other than the primary SMTP address.
Microsoft plans to make this new feature available worldwide in standard multi-tenant environments by the end of next month.
Source of information: bleepingcomputer.com