Lets see how to create a conditional Forwarder in Microsoft DNS and inflobox to Create Two way transitive Trust prior to the migration.
Open Microsoft DNS Manager – Right Click on Conditional Forwarder – New Conditional forwarder
Enter the Other Forest Domain Name
Choose OK.
So any request to Azure365pro.com
ad.azure365pro.com will resolve from 172.21.1.100
Am doing this from Forest A to Forest B (Azure365pro.com)
Lets see how to create the same forwarder if you have a custom DNS Solution like inflobox
Adding Forwarding zone in Inflobox for Azure365Pro.com
Step 1 – Add Forward Zone
Step 2 – Add and authoritative forward-mapping zone
Step 3 – name – azure365pro.com
Add Name Servers
azure365pro.com Name Servers / Domain Controllers (AD Integrated DNS Servers)
azure365pro.com 10.10.10.10
azure365pro.com 10.10.10.11
Step 4 – Leave members empty
Step 5 – Leave Extensible Attributes empty
Choose Next
Step 6 – Choose Save and Close
