Sean McDonough’s Most Excellent SharePoint Backup Augmentation Cmdlets

Sean McDonough has introduced a project called SharePoint Backup Augmentation Cmdlets. This farm-based solution adds a few new SharePoint Cmdlets to the mix:


The Cmdlets can be used together to automatically maintain a backup catalog, at the specified size or backup count.

To deploy the solution, copy the SharePointBAC.wsp to a local SharePoint Server. Run the SharePoint Management Shell and navigate to the directory containing the SharePointBAC.wsp solution. Run:

Add-SPSolution <Full Path to SharePointBAC.wsp>
Install-SPSolution SharePointBAC.wsp -GACDeploy

As an example, if we wanted to keep two backups on a file share, we would run:

$Catalog = Get-SPBackupCatalog \\fileserver\share
$Catalog | Remove-SPBackupCatalog -RetainCount 2

This will enumerate the existing backup catalog and then remove all but the two most recent backups.

In this example, let’s say we have a requirement where we want to keep the last backup, but only if the current backup finishes without warnings or errors:

$Catalog = Get-SPBackupCatalog \\fileserver\share
Backup-SPFarm -Directory \\fileserver\share -BackupMethod full
if ($Catalog.LastBackupErrorCount -eq 0 -and $Catalog.LastBackupWarningCount -eq 0)
	$Catalog | Remove-SPBackupCatalog -RetainCount 1 -Confirm:$false

Lastly, if you want to send a status email of the last backup, we can use the Send-SPBackupStatus command with a comma-delimited list of email addresses:

$Catalog = Get-SPBackupCatalog \\fileserver\share
$Catalog | Send-SPBackupStatus -Recipients ","

If the catalog changes after you’ve set a variable for the catalog, do not forget to call $Catalog.Refresh()!.

These Cmdlets are at an Alpha 0.2 revision at the time of writing, however functionality-wise they have performed as expected so far. I highly recommend these Cmdlets to anyone working with SharePoint’s built-in backup methods.

Trevor Seward is a Microsoft Office Apps and Services MVP who specializes in SharePoint Server administration, hybrid scenarios, and SharePoint Online. He has been working with SharePoint for 16 years from SharePoint 2003 on up, managing environments with terabytes of content for 150,000+ user organizations. Trevor is an author of Deploying SharePoint 2016 and Deploying SharePoint 2019. You can find him on Twitter and in /r/sharepoint.