On-Prem Forest Domain Controller Migration with Azure

Steven LMM 1 Reputation point


I am looking for some best practices. Long story short, my company is breaking away from our parent company. Currently, the have a DC part of a forest (ad.lmm___.com). We are looking to build a new forest (core.lmm____.com). Our primary domain is (lmm___.com). After the forest is built, we will use the active directory migration tool and sync to Azure with the AD Connect tool. Once this is done, the plan is to have the users log in and start ADMT, let it do its thing. We just got out of a meeting between the 2 companies and I think we over complicated this process.

Is there a best practice for this? My concern is our 0365 suite and Exchange 0365.

Thank you in advance for any insight.


Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. JimmySalian-2011 41,916 Reputation points

    Hi Steven,

    I think some of the points are not clear, do you have your own tenant after the split? Where are the mailboxes hosted is it onprem or hybrid setup currently? Do you own the new domain name for the Azure setup? There are lot of questions and information required for this kind of scenario .

    I would suggest you follow this guidelines for Tenant to Tenant migrations - microsoft-365-tenant-to-tenant-migrations

    For Onpremise migration to another domain please follow the guidelines here - cc974332(v=ws.10)

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