My current company, let say ParentCo.com (1000+ user base) has just acquired new smaller company of just 80-100 users last month.
They've got all on premise:
AD domain controllers - Single Forest domain called ChildCo.com
File Servers ~ 12 TB on their office
Exchange server 2010 with email domain ChildCo.com, ChildCo2.com, Company2.com and SmallCo.com [my current email domain is First.LastName@ParentCo.com]
35+ Windows Server AD domain joined to ChildCo.com
AD user account: FLastname@ChildCo.com [my current AD domain uses First.LastName@ParentCo.com]
So how can I integrate them all into my Datacenter with the AD domain ParentCo.com and converting all users to be First.LastName@ParentCo.com ?
Where to start first so I can allow them to logon to my AD domain using First.LastName@ParentCo.com & access email from my new company ?
I will create the separate thread for migrating:
to my ParentCo.com AD domain.