Hello everyone,
I have a quick question. I have a on prem exchange enviornment and we have recently signed up for office 365. we are deploying ADFS and Hybrid enviornmnet. Now here the catch:
MY office 365 domain is mydomain.com
My on prem exchange accepted domain is mail.mydomain.com. The MX records in my external dns is setup for mail.mydomain.com which is the on prem
now will that be an issue that the domains are different?
I have added the mail.mydomain.com in my office 365 domains as well. but have not added the DNS records cuz i am confused of what will be the conflict between two. if i configure the DNS record to point mx to office 365 what will happen to on prem enviornment? will that stop working. Can i add mail.mydomain.com in office 365 and have them both enviornments work at the same time? will the DNS records in external affect anything?