When planning a hybrid Office365 deployment, consider your internal Active Directory domain name. If it is the same as your external DNS domain name, you have planned well and will go far in life.
If you’re me, you created an internal domain long before your team decided on an external domain (i.e. found the cheapest semi-professional domain for sale). This eventually put us in the awkward position of having
- ‘capstone.internal’ AD Domain Name (with DNS zone name) and
- ‘capstonebeststone.com’ external domain name. (not our real domain name)