Get CSV Report on "Send As" Access rights from office365 users Mailboxes

This script will get you report on "send as" permission in a format, that you could use quickly to reapply the permission on the Mailbox, usually this comes handy at the time of migrations in cross organization, or you can utilize this script if you wish to keep the backup of the permission records.

########################################
# Send As Permission backup report
# Author : Sunil Chauhan
# Email: sunilkms@hotmail.com
# This script takes backup of Send as permission.
########################################

#----------------------------------------
# Edit Mail Notification Settings Here
#-----------------------------------------

$mail=@{

  To = "sunilkms@LetsExchange.com"
  From = "sunilkms@LetsExchange.com"
  SMTPServer = "smtp.office365.com"
  
  }

#-------------------------------------------------------------
# you can customize the current msg as per your requirement.
#-------------------------------------------------------------

$body =

"
Hi,


Please Find the Attached Report for $(get-date -Format MM/dd/yyyy).


Thanks

"

#---------------------------------------------------------
# Log
#---------------------------------------------------------

$LogFile = "SendAs-Report-Logs.log"

Add-content -path $logFile -value "$(get-date -Format MM/dd/yyyy-hh:mm:ss) :Starting.."

# Send As Permission Report Code Start from Here

Add-content -path $logFile -value "$(get-date -Format MM/dd/yyyy-hh:mm:ss) :Now Getting Send As Permission.."
Write-host "Getting Send As Permission Report.." -f Yellow

# Getting Receipent Permission of all the mailboxes.
$RecipientPermissions = Get-RecipientPermission -ResultSize unlimited

#Formating data
$SendAsRights = $RecipientPermissions | ? {$_.trustee -ne "True" -and $_.Trustee `

-notlike "S-1-5*" -and $_.Trustee -notlike "*Self"} | select Identity,Trustee, Accessrights

# Attachment file Name
$sendAsAttachment = "SendAs-Permission-Backup" + $(get-date -Format MM-dd-yyyy) + ".csv"

#Exporting report Data.
$SendAsRights | Export-csv "$sendAsAttachment" -NoType

Add-content -path $logFile -value "$(get-date -Format MM/dd/yyyy-hh:mm:ss) : Send As Report is Ready to be sent."

"Sending Email"
$Subject = "Send As Permission Backup for $(get-date -Format MM/dd/yyyy)"
Send-MailMessage -from $mail.From -to $mail.to -subject $Subject -Body $body -SmtpServer $mail.SMTPServer -Attachment $sendAsAttachment
Add-content -path $logFile -value "$(get-date -Format MM/dd/yyyy-hh:mm:ss) :Send As Report Was Sent Successfully"
Add-content -path $logFile -value "$(get-date -Format MM/dd/yyyy-hh:mm:ss) :Reporting End."