Hi,
Would you please tell more information about your questions to narrow down the issue?
1, You want to do a migration from old.dom to new.dom, at the same time you want the migrated users keep the permissions to access resource in old.dom domain, right?
In this situation, we need to disable the SID filter from the target domain where the (migrated) users have the sidHistory attribute using the enterprise administrator of the target domain. (new.dom)
2, You created a 2-way trust (forest or external), right?
The commands are a little different:
Command for external \domain trust
From the source domain (Domain Trust) run command:
NETDOM TRUST SOURCE_DOMAIN /Domain:APPROVED_DOMAIN /Quarantine:No
From the destination domain (Domain Trust):
NETDOM TRUST DESTINATION_DOMAIN /Domain:APPROVED_DOMAIN /Quarantine:No
Command for forest trust:
From the source domain (Forest Trust):
NETDOM TRUST SOURCE_DOMAIN /Domain:APPROVED_DOMAIN /EnableSIDHistory:yes
From the destination domain (Forest Trust):
NETDOM TRUST DESTINATION_DOMAIN /Domain:APPROVED_DOMAIN /EnableSIDHistory:yes
Following link for your reference:
https://learn.microsoft.com/en-us/archive/blogs/csstwplatform/how-to-disabling-sid-filter-quarantining-allowing-sid-history
https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)?redirectedfrom=MSDN