Linked Mailboxes

Hi

We have two forests - our original AD forest (ADForest) running Windows 2008 DC and also an Exchange 2007 forest (ExchangeForest) holding user mailboxes. There are trusts etc set up, but I was wondering how this would all work.

For instance, I have a manager's mailbox in the Exchange forest. I want to give an Assistant access to that....do I just give access to their ADForest account? Wil this mean that their Outlook can access the Manager's one?
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Joe_BuddenAsked:
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MegaNuk3Connect With a Mentor Commented:
You can do it either way. Either give the Assistants ADaccount from the AccountForest 'Full mailbox access' rights on the mailbox or if you want to do delegation or in-mailbox permissions then assign the assistants mailbox the delegated permissions or outlook subfolders permissions.
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Joe_BuddenAuthor Commented:
So whenever we come to permissions, it's exactly the same as if there was only one forest? Exchange 'knows' that whenever we want to assign someone a mailbox permission, we can use the AD account in the ADForest domain?
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MegaNuk3Commented:
Yep, Apart from delegation or in-mailbox folder permissions where you will have to assign the permissions to the resource forest mailbox because you can only select objects from the GAL to give out these folder permissions.
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Joe_BuddenAuthor Commented:
That's a good point.

If I am looking at the GAL in the ADForest - what objects am I actually looking?
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MegaNuk3Commented:
The GAL is from the forest where exchange is installed and where the mailbox is located that you are using to view the GAL
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Joe_BuddenAuthor Commented:
What's the best practice though?

Same example:

AD Forest: ADForest (accounts users use to log in etc)
Exchange Forest: ExchangeForest (mailboxes only set up as Linked Mailboxes, the corresponding AD account for the mbx is disabled)

I have a Manager and I want to give his PA 'full mailbox access' to his mailbox. So I go to EMC > Mailbox > Manage Full Access Permission

What account should I add

1. The PA's ADForest user account
2. The PA's ExchangeForest account (or am I actually choosing her mailbox here)?
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MegaNuk3Commented:
Add the Exchange Account/mailbox and it will work, that is the best way too.
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