We are using Windows Server 2003 R2, have two separate Active Directories (and forests) on our company and we created a forest trust between them. We need to be able to share resources and administrative access. The trust was established successfully but now we're struggling with the access rights. The problems we have encountered so far are:
1. Users from one forest can't authenticate on servers on the other forest with the error "The local policy of this system does not permit you to logon interactively".
2. We can't add groups (of any kind) or users from one forest to the other. For example we tried adding the administrators from forest B to the Domain Admins group of forest A but the system doesn't allow it.
3. We haven't been able to delegate any administrative tasks.
Don't know if we're missing any steps or if we did anything incorrectly. The trust between the forest is a two way domain trust and it has been validated.