I have a domain with approximately 35 users running Windows 2008R2 server and Exchange 2010.
lets say the name is domain1.com
However at some point sometime ago company name changed and as such emails changed, so while is AD is still domain1.com the emails are domain2.com
We no longer own domain1.com domain so for our purposes its a local domain, we only own domain2.com
Exchange is setup to receive emails via "Accepted domains" and all users have proxy email address user@domain2.com setup as Primary SMTP email.
We are preparing to migrate to Office 365 and considering a hybrid environment, although cutover may work as well.
All literature i am reading is that a recommendation for on-prem AD to be same as Azure AD, i.e. domain2.com however reading about renaming domains it sounds like it's a nightmare to deal with.
Can you pls give me step by step recommendations? Am i overcomplicating? Should i just keep my local domain as domain1.com and Azure domain2.com?
Should i create a brand new local domain2.com and migrate users from domain1.com to domain2.com?
Also am i better off to keep a hybrid vs cutover environment? It sounds like there is a benefit in hybrid but i also don't want to overcomplicate things as well.
thank you so much for your help in advance.