I am trying to figure out the following:
I need to group users in a child domain to have full and send-as rights to a shared mailbox in a exchange 2010 resource environment. We have over 60 shared mailboxes and some have anywhere from 2-25 users that need to access a shared mailbox. right now I have to add the AD child domain user account to the send-as and full rights, plus their exchange AD mailbox account so that they have access to send on behalf of, create folders, archive and delete. Adding the exchange mailbox account will allow the autopopulation of the shared mailbox to their personal exchange mailbox account in Outlook 2007.
I have tried creating a global and universal security group in the child domain, but it wont attach using powershell. Then I create a security group in the exchange 2010 AD to quickly add the users at once to autopopulate.