<#
.SYNOPSIS
    Build Import file for o365 mail enabled objects
.DESCRIPTION
    Export AD properties to Sync from resource forest Exchange 2010 to on-premise AD in preparation of migrating to O365.
.PARAMETER <paramName>
   <Description of script parameter>
.EXAMPLE
 Generate the CSV file for export..

 $ExportNames = get-mailbox -organizationalunit "Finance" -recipienttypedetails LinkedMailbox -resultsize unlimited
 .\Export-RFToAD.ps1 -identity $ExportNames  -acceptedDomain "Example.COM" -O365Domain "Contoso.OnMicrosoft.com" -department "Finance"

#>


#Name (name)
#DisplayName (displayname)
#SamAccountName (SamAccountName)
#WindowsEmailAddress (mail)
#PrimarySMTPAddress (from ProxyAddresses)
#LegacyExchangeDN (legacyExchangeDN)
#EmailAddresses (proxyaddresses)
#ExchangeGUID (msExchMailboxGUID)
#GrantSendOnBehalfTo (publicDelegates)
#ExternalEmailAddress (TargetAddress)

[CmdLetBinding()]
param(
    [parameter(Mandatory=$true)]
    $Identity,
    [parameter(Mandatory=$true)]
    [string[]]$AcceptedDomains,
    [parameter(Mandatory=$true)]
    [string]$o365Domain,
    [parameter()][string]$Department   #Only used in naming of the CSV at end.

)

$NotIsADLoaded = ((get-command "get-aduser" -ea SilentlyContinue) -eq $null)
if ($NotIsADLoaded ) {Import-Module ActiveDirectory}

#If fed mailboxes, it will strip off SamAccountName
if (!($identity[0] -is [string]) -and ($identity[0].samaccountname -ne $null)) {
    $Identity = $identity | %{$_.samaccountname}
}

if ($o365Domain -notlike "*@*") {
    $o365Domain = "@"+$o365Domain
}

$AcceptedDomains = ($AcceptedDomains | %{$_.trim()}) -join(";")

if ($identity -is [string] -or ($identity -is [array] -and $identity[0] -is [string])) {
    write-host "Attempting to read users as SamAccountName"
    $Found = $identity | sort-object | %{Get-aduser -identity $_ -properties name,displayname,samaccountname,mail,legacyExchangeDN,proxyaddresses,publicdelegates,targetaddress,msexchmailboxguid,telephonenumber,company,department}
} elseif ($identity.samaccountname -ne $null -or ($identity -is [array] -and $identity[0].samaccountname -is [string])) {
    write-host "Using SamAccountName property on each Object"
    $Found = $identity | sort-object | %{Get-aduser -identity $_.SamAccountName -properties name,displayname,samaccountname,mail,legacyExchangeDN,proxyaddresses,publicdelegates,targetaddress,msexchmailboxguid,telephonenumber,company,department}
}

if ($found) {
    $ProcessedUsers =@()
    if ($found -is [array]) {$FoundCount = $found.count } else {$FoundCount = 1};$Index =1
    ForEach ($User in $Found | ?{$_.mail -ne $null}) {
        write-progress -Activity "Reading User Information" -status $User.mail -PercentComplete (($Index / $FoundCount)*100);$Index++
        if ($Department -eq $null) {$department = $user.department}
        $mbx = get-mailbox $user.distinguishedname -ea silentlycontinue
        if ($mbx -ne $null) {
            #Create user object with basic account info.
            $FilteredUser = $User | select name,displayname,mail,samaccountname,targetaddress,telephonenumber,department,company
            $userMailDomain = $user.mail.split("@")[1]
            if (!($AcceptedDomains -match $userMailDomain)) {
                write-host "invalid domain in MAIL field For ",$($user.Displayname),":" -NoNewline
                if ($user.proxyaddresses.count -gt 0) {
                    $acceptedEmails = $user.proxyaddresses | ?{$_ -clike "SMTP:*" -and $AcceptedDomains -match $_.split("@")[1]}
                    if ($acceptedEmails.count -gt 1) {
                        $PrimarySMTP = $AcceptedEmails[0]
                    } else {
                        $PrimarySMTP = $AcceptedEmails
                    }
                    $FilteredUser.mail = $PrimarySMTP
                    write-host "`t setting to $PrimarySMTP"
                } else {
                    write-host "`t no proxy address, assigning onMicrosoft domain."
                    $FilteredUser.mail = $user.mail.split("@")[0]+$o365Domain
                }
            }

            #Pull out only SMTP email addresses that are allowed in ProxyAddresses field.
            $FilteredUser_EmailAddresses = [array]($User.proxyaddresses | ?{$_ -like "smtp:*" -and ($AcceptedDomains -match $_.split("@")[1])} | %{$_.split(":")[1]})
            #Add redirector email address to o365 domain
            #$UserPrefix = "smtp:"+$User.Mail.split("@")[0]
            $UserPrefix = "smtp:"+$user.SamAccountName.replace(" ","")
            #$FilteredUser_emailaddresses += [array]$($UserPrefix+$o365Domain)
            if ($o365Domain -notlike "*.mail.onmicrosoft.com") {
                $O365MAILDomain = $o365Domain.replace(".onmicrosoft",".mail.onMicrosoft")
                $FilteredUser_emailaddresses += [array]$($UserPrefix+$O365MAILDomain)
            } elseif ($o365Domain -like "*.mail.onmicrosoft.com") {
                $O365MAILDomain = $o365Domain.replace(".mail.onmicrosoft",".onMicrosoft")
                $FilteredUser_emailaddresses += [array]$($UserPrefix+$O365MAILDomain)
            }
            #Add x500 for on-premise domain
            $FilteredUser_emailaddresses += [array]$("X500:"+$User.LegacyExchangeDN)
            #Add everything to the Filtered User object.
            $FilteredUser | add-member -name "EmailAddresses" -membertype Noteproperty -value ($FilteredUser_EmailAddresses -join(";"))
            #See if User has Delegates aand add their SMTP email address
            if ($User.PublicDelegates) {
                $MyDelegates = $User.PublicDelegates | %{(Get-recipient $_ -erroraction silentlycontinue).primarysmtpaddress}
                $FilteredUser | add-member -name "publicDelegates" -membertype Noteproperty -value ("'"+($MyDelegates -join("';'")) +"'")
            } else {
                $FilteredUser | add-member -name "publicDelegates" -membertype Noteproperty -value "''"
            }

            if ($mbx.linkedmasteraccount -like "*\*") {
                #Add Linked Master Account info, but exclude the AD Domain info.
                $FilteredUser | add-member -name "LinkedMasterAccount" -membertype Noteproperty -value $mbx.LinkedMasterAccount.split("\")[1]
            } Else {
                $FilteredUser | add-member -name "LinkedMasterAccount" -membertype Noteproperty -value ""
            }
            #$FilteredUser | add-member -name "CustomAttribute3" -membertype Noteproperty -value $mbx.CustomAttribute3
            #$FilteredUser | add-member -name "CustomAttribute9" -membertype Noteproperty -value $mbx.CustomAttribute9
            $FilteredUser | add-member -name "HiddenFromAddressListsEnabled" -membertype Noteproperty -value $mbx.HiddenFromAddressListsEnabled
            $FilteredUser | add-member -name "LitigationHoldEnabled" -membertype Noteproperty -value $mbx.LitigationHoldEnabled
            #Add the Exchange GUID value, in String not HEX format.
            $FilteredUser | add-member -name "ExchangeGuid" -membertype Noteproperty -value $mbx.ExchangeGuid.tostring()
            $FilteredUser | add-member -name "RecipientTypeDetails" -membertype Noteproperty -value $mbx.RecipientTypeDetails
            $ProcessedUsers += $FilteredUser
        } else {
            write-host "ERROR: Mailbox not found for ",$user.displayname
            $ErrorReportFilePath = "\\rf01\camail\Scripts\GalSync\"+$Department+"_MissingMailboxes_"+$datestr+".txt"
            $user.displayname | Out-File -Append -FilePath $ErrorReportFilePath
        }
    }
    #Create Output file.
    $datestr = [string](Get-Date -UFormat "%m-%d-%y")
    $FilePath = ".\"+$Department + "_RF01_Mailbox_Properties_"+$datestr + ".csv"
    $ProcessedUsers | export-csv $FilePath -notypeinfo
    write-host "completed. ",$FilePath
} else {write-host "No users found"}