Calendar viewing permissions

My client recently added 20 new users to his company. the owner can currently view all calendar details on all of the original company users, but can't for the newer users. In the exchange management console i set the default calendar permissions to to show more details. i also made a new policy and applied to just the new users.
I know there are power-shell commands to set permissions, but i am unsure of the syntax on how to specify a one user to a group of users. is this possible? if not what would be the 1 - 1 user power-shell command be?
Abacus ITAsked:
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AmitIT ArchitectCommented:
By default, user can view calendar for every user. It seems you are asking for mailbox level permission?

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Abacus ITAuthor Commented:
the user can see the other users calendar events but not the details only that they are busy. my client wants to see the details without requesting the users for permission.
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