Hello
Thank you for posting in Q&A forum.
You can create two-way forest trust between the two AD forest.
For more information about how to set up it, you can read the thread below. There are detailed steps about it.
setup of trust relationship between 2 domains
https://learn.microsoft.com/en-us/archive/msdn-technet-forums/9e501d72-5457-421a-b81b-3a1f83ac7b0e
I hope the information above is helpful.
If you have any questions or concerns, please feel free to let us know.
Best Regards,
Daisy Zhou
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