PowerShell script to Major and Minor versions across SharePoint sites and remove out-of-date versions

This script can run in one of two modes

1. What If - Non destructive dry run, will report on potential space savings
2. Delete Old Versions - Same as above but will actually delete versions in SharePoint

1. Edit the CreateSelfSignedCert.ps1 file.
2. Replace {certificateName} with something like SharePoint Version Control.
3. Navigate to directory in PowerShell and run ./CreateSelfSignedCert.ps1
4. Make a note of the random string that gets output (the Thumbprint).

1. Sign in to the Azure portal
2. Navigate to App Registrations
3. New Registration

• Name your app something like "Sharepoint Version Control"

• Select the correct account type (normally Single Tenant)

• Leave Redirect URL empty

• Click Register

• Make note of the Application (client) ID

• Make note of the Directory (tenant) ID

• Click "View API permissions"

• Click Add a permission
• Click the Sharepoint block
• Click Application permissions
• Check 'Sites.FullControl.All' or 'Sites.Selected' if you only want to look at one SharePoint Site
• Click Add permissions button
• You should see your new permission for SharePoint Listed
• Click 'Grant admin consent'

• upload it

This file holds the SharePoint URLs for the sites you want to process.

1. Install PNP module (used so PowerShell can talk to Sharepoint) Install-Module -Name PnP.PowerShell
2. Make sure PowerShell has script execution permissions, follow instructions here.