I need to add my company's domain nsca.com and nsca-lift.org to office 365 to prepare for migration. Currently these domains point in DNS to our website http://www.nsca.com and if someone types nsca-lift.org it is forwarded to nsca.com. Our MX record for nsca.com points to my on-premises exchange server. When I add these domains to office 365 that should not interfere with the DNS for my website, correct? I know that it doesn't for the MX record until I get it changed after migration.
Thanks.
Mitch