Public/Migration/MailboxMove/PostMigrationTask/Set-MailboxMoveRetentionPolicy.ps1

function Set-MailboxMoveRetentionPolicy {
    <#
    .SYNOPSIS
    Sets Office 365 Retention Policy during a migration project
    Either CSV or Excel file from SharePoint can be used
 
    .DESCRIPTION
    Sets Office 365 Retention Policy during a migration project
    Either CSV or Excel file from SharePoint can be used
 
    .PARAMETER SharePointURL
    Sharepoint url ex. https://fabrikam.sharepoint.com/sites/Contoso
 
    .PARAMETER ExcelFile
    Excel file found in "Shared Documents" of SharePoint site specified in SharePointURL
    ex. "Batchex.xlsx"
    Minimum headers required are: BatchName, UserPrincipalName
 
    .PARAMETER MailboxCSV
    Path to csv of mailboxes. Minimum headers required are: BatchName, UserPrincipalName
 
    .EXAMPLE
    Set-MailboxMoveRetentionPolicy -MailboxCSV c:\scripts\batches.csv
 
    .EXAMPLE
    Set-MailboxMoveRetentionPolicy -SharePointURL 'https://fabrikam.sharepoint.com/sites/Contoso' -ExcelFile 'Batches.xlsx'
 
    .NOTES
    General notes
    #>


    [CmdletBinding(DefaultParameterSetName = 'SharePoint')]
    param (
        [Parameter(Mandatory, ParameterSetName = 'SharePoint')]
        [ValidateNotNullOrEmpty()]
        [string]
        $SharePointURL,

        [Parameter(Mandatory, ParameterSetName = 'SharePoint')]
        [ValidateNotNullOrEmpty()]
        [string]
        $ExcelFile,

        [Parameter(Mandatory, ParameterSetName = 'CSV')]
        [ValidateNotNullOrEmpty()]
        [string]
        $MailboxCSV
    )
    end {
        switch ($PSCmdlet.ParameterSetName) {
            'SharePoint' {
                $SharePointSplat = @{
                    SharePointURL = $SharePointURL
                    ExcelFile     = $ExcelFile
                }
                Invoke-SetMailboxMoveRetentionPolicy @SharePointSplat | Out-GridView -Title "Results of Set Mailbox Retention Policy"
            }
            'CSV' {
                $CSVSplat = @{
                    MailboxCSV = $MailboxCSV
                }
                Invoke-SetMailboxMoveRetentionPolicy @CSVSplat | Out-GridView -Title "Results of Set Mailbox Retention Policy"
            }
        }
    }
}