Exchange PowerShell tips

Add Full Mailbox permissions to all mailboxes in the exchange organization:

# Matt’s Powershell Script (see tigermatt.wordpress.com) to add Full Mailbox permissions to all mailboxes in the Exchange organization
Add-PSSnapin Microsoft.Exchange.Management.Powershell.Admin -erroraction silentlyContinue
$userAccounts = get-mailbox -resultsize unlimited
ForEach ($user in $userAccounts)
{
add-MailboxPermission -identity $user -user “your-admin-account-name” -AccessRights FullAccess
}

Delete all messages in specific users' mailboxes with a specific title:

Add-PSSnapin Microsoft.Exchange.Management.Powershell.Admin -erroraction silentlyContinue
#$userAccounts = get-mailbox -resultsize unlimited
ForEach ($user in "John Doe", "Jane Doe", "Humpty Dumpty")
{
get-Mailbox -Identity $user | Export-Mailbox -SubjectKeywords "This is the message subject" –DeleteContent –MaxThreads 10
}

Delete all messages in an Exchange organization with a specific title:

Add-PSSnapin Microsoft.Exchange.Management.Powershell.Admin -erroraction silentlyContinue
$userAccounts = get-mailbox -resultsize unlimited
ForEach ($user in $userAccounts)
{
Export-Mailbox -Identity $user-SubjectKeywords "This is the message subject" –DeleteContent –MaxThreads 10
}