powershell-scripts/Save Sent Items in Shared Mailbox/SaveSentItemsInSharedMailbox.ps1

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<#
=============================================================================================
Name: Save sent items in Shared Mailbox using PowerShell
Description: Emails sent from shared mailboxes are saved in the user's sent items by default. To save a copy of email in Shared mailbox's sent ietms, run this script.
Version: 1.0
Website: M365scripts.com
For details: https://m365scripts.com/exchange-online/how-to-save-sent-items-in-shared-mailbox/
============================================================================================
#>
#Check for EXO module inatallation
$Module = Get-Module ExchangeOnlineManagement -ListAvailable
if($Module.count -eq 0)
{
Write-Host Exchange Online PowerShell module is not available -ForegroundColor yellow
$Confirm= Read-Host Are you sure you want to install module? [Y] Yes [N] No
if($Confirm -match "[yY]")
{
Write-host "Installing Exchange Online PowerShell module"
Install-Module ExchangeOnlineManagement -Repository PSGallery -AllowClobber -Force -Scope CurrentUser
Import-Module ExchangeOnlineManagement
}
else
{
Write-Host EXO module is required to connect Exchange Online.Please install module using Install-Module ExchangeOnlineManagement cmdlet.
Exit
}
}
Write-Host Connecting to Exchange Online...
#Storing credential in script for scheduling purpose/ Passing credential as parameter - Authentication using non-MFA account
if(($UserName -ne "") -and ($Password -ne ""))
{
$SecuredPassword = ConvertTo-SecureString -AsPlainText $Password -Force
$Credential = New-Object System.Management.Automation.PSCredential $UserName,$SecuredPassword
Connect-ExchangeOnline -Credential $Credential
}
elseif($Organization -ne "" -and $ClientId -ne "" -and $CertificateThumbprint -ne "")
{
Connect-ExchangeOnline -AppId $ClientId -CertificateThumbprint $CertificateThumbprint -Organization $Organization -ShowBanner:$false
}
else
{
Connect-ExchangeOnline
}
#Retrieve all the shared mailbox and configure to save email copies in sent items
Get-Mailbox ResultSize Unlimited -RecipientTypeDetails Sharedmailbox | foreach {
Set-mailbox -Identity $_.UserPrincipalName -MessageCopyForSendOnBehalfEnabled $true -MessageCopyForSentAsEnabled $true
}