Updating SharePoint Site Logo and Thumbnail with PowerShell

Update SharePoint Site Logo and Thumbnail with PowerShell

In SharePoint Online sites, the distinction between the Site Logo and Site Thumbnail is crucial. The site logo appears in the site header, while the site thumbnail is used in search results, site cards, file copying/moving, and other areas.

Both site logo and thumbnail are part of SharePoint branding. This post covers how to update the site logo and thumbnail across multiple SharePoint sites within a hub using PowerShell.

I used the script to update site logo and thumbnail for associated sites within a hub site which could be an intranet if there are no valid site logo and thumbnail already on the site.

PowerShell Script

This scripts updates the site logo and thumbnail for all sites associated with a specific hub site.

Please update the variables

  • $AdminCenterURL= sharepoint centre url
  • $tenantUrl = tenant url
  • $hubSiteUrl = hub site url
  • $logoLocalPath : path of the logo file
  • $thumbnailLocalPath = path of the thumbnail file
$AdminCenterURL="https://contoso-admin.sharepoint.com"
$tenantUrl = "https://contoso.sharepoint.com"
$hubSiteUrl = "https://contoso.sharepoint.com"

$logoLocalPath = (Get-Location).Path + '\Logo\logo white 1280x1280.png'
$thumbnailLocalPath = (Get-Location).Path + '\Logo\thumbnail white 1280x1280.png'

Connect-PnPOnline -Url $AdminCenterURL -Interactive
 
$logoLocalPath = (Get-Location).Path + '\Logo\logo white 1280x1280.png'
$thumbnailLocalPath = (Get-Location).Path + '\Logo\thumbnail white 1280x1280.png'
 
$m365Sites = Get-PnPHubSiteChild -Identity $hubSiteUrl

Start-Transcript
 
$m365Sites | ForEach-Object {
    Connect-PnPOnline -Url $_ -Interactive
    $logoFile = '__rectSitelogo__contoso-logo.png'
    $thumbnailFile = 'thumbnail.png'

    $logoRelativePath = $_.replace($tenantUrl, "") + "/SiteAssets/" + $logoFile
    $thumbnailRelativePath = $_.replace($tenantUrl, "") + "/SiteAssets/" + $logoFile

    $logoAslistItem =  Get-PnPFile -Url $logoRelativePath -AsListItem
    $thumbnailAslistItem =  Get-PnPFile -Url $thumbnailRelativePath -AsListItem
 
    if(!$logoAslistItem){
      Add-PnPFile -Path $logoLocalPath -Folder 'SiteAssets' -NewFileName $logoFile | Out-Null
    }
    
    if(!$thumbnailAslistItem){
      Add-PnPFile -Path $thumbnailLocalPath -Folder 'SiteAssets' -NewFileName $thumbnailFile | Out-Null
    }
 
    Set-PnPWebHeader -SiteLogoUrl $logoRelativePath -SiteThumbnailUrl $thumbnailRelativePath
}
Stop-Transcript

After running the script

Update Site Logo and Thumbnail

Conclusion

Updating the site logo and thumbnail for each SharePoint site manually can be a tedious and time-consuming task, especially for organisations with a large number of sites as part of rebranding or branding exercise.

This PowerShell script helps to automate updating site logo and site thumbnail for consistent branding across a SharePoint hub site.

References

How to change the header banner image of a sharepoint site using Power Automate

Enhancement: spo site set enhance logo options