We have currently deployed Office 365 with SSO identity federation. Due to an acquisition and company name change, and a desire to sell our current domain name, we are proposing a new windows 2012 Active Directory - possibly an Azure hybrid forest and will collapse our existing forests into the new one.
As accounts are migrated to the new forest, what are our options to connect the existing Office 365 mailbox to the new AD account after the forests are merged? Does the mail need to be migrated to a new instance?
We will likely use Quest QMM for the forest migration.