Confirmation and reminder emails sent by/from default domain

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Bookings notifications are being sent by our old default domain ( We want them sent from and this domain is active/verified. I just can't figure out why the emails from the Bookings app are sending from the old one or how to fix it. Any thoughts?


2 Replies

@Deleted You can change the primary SMTP address of the Bookings mailbox by running the following command:


Set-Mailbox <current_bookings_address> -WindowsEmailAddress <desired_bookings_address>


Keep in mind that the confirmations and reminders won't switch immediately to the new address.

I did a write-up on how Bookings sends emails and how to adjust the sender address here: