Microsoft Exchange Server is a mail server and calendaring server developed by Microsoft.
Send approved attendee messages and review address errors.
Your scheduled mail merge uses the latest recipient list, so you can see who was emailed and which rows need attention.
Send attendee emails from Excel and see which addresses need fixing.
Your mail merge from Excel uses your work mailbox, and a results workbook shows which recipient rows need attention.
Prepare attendee contact cards as a CSV for event team review.
Get a contact CSV in your chosen review folder when a VCF export arrives by email, plus a reply highlighting missing details.