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Exchange 2007 users able to send emails from other accounts

I have a problem on Exchange Server 2007 running on 2008 R2 where users are able to send emails from other accounts by clicking on the from box. I have checked the permissions in exchange and user accounts as well as delegations  and made sure they are not in any admin groups. any ideas would be grateful.

1 Solution
Mahesh SharmaCommented:
Check if everyone is given full permissions:

Get-MailboxDatabase -Identity <DB> | Get-AdPermissions
somatthiasAuthor Commented:
Have checked not a problem
Simon Butler (Sembee)ConsultantCommented:
Send As is the permission that is doing this, not full mailbox.
Somewhere they have the permission.

Check what groups have Send As permission within Exchange and then track back to see if Domain Users or something has been added to the group.

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Md. MojahidCommented:
You grant User B Full Access Permission for User A’s Mailbox.

Simon Butler (Sembee)ConsultantCommented:
Full mailbox doesn't grant Send As permissions.

Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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