In my previous article, I shared details for changing site logo for a site collection and its sub sites using PowerShell, but that was only for on-premise environment. PowerShell script for SharePoint Online is different from on-premise where we refer SharePoint client dlls, make sure you should have installed SharePoint Online Management Shell, if not then you can download it from this link.

I have update the script at technet gellery for changing site logo for both SharePoint On-Premise as well as for SharePoint Online, you can download it from this link.

MsTechtalk Technet gallery

Below is the PowerShell script which update the site logo for all sub sites under a site collection, it will ask you for site URL, user name and password.


$siteUrl = Read-Host -Prompt “Enter site collection URL (” #you can also set the site URL
$userToLogin = Read-Host -Prompt “Enter Username” #you can also set the user name, make sure it should be global admin
$password = Read-Host -Prompt “Enter Password” -AsSecureString
$sitelogoURL = “/SiteAssets/newSitelogo.gif” #change the site logo
$clientContext = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl)
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($userToLogin, $password)

$clientContext.Credentials = $credentials

$web = $clientContext.get_web()
$webs = $clientContext.Web.Webs;


function updateSubSites($subWeb) {
$subsites = $subWeb.Webs;
foreach ($subSite in $subsites) {

function updateSiteLogo($subWeb) {
$subWeb.SiteLogoUrl = $sitelogoURL

Write-Host “Updated logo for ” $subWeb.Title ” , site url:” $subWeb.Url


foreach ($subWeb in $webs)
write-host “inside bottom foreach”

You might get below exception if the user is not global admin, so make sure you have credentials for global admin.

Exception calling “ExecuteQuery” with “0” argument(s): “The Login server cannot issue the requested compact encrypted ticket because a Data Encryption Key (DEK) has not been uploaded to the site.”

At line:19 char:1

+ $clientContext.ExecuteQuery()

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException

    + FullyQualifiedErrorId : IdcrlException

Adnan is six time Microsoft MVP (Since 2015) with over 16 years of extensive experience with major expertise on SharePoint, SharePoint based development, Microsoft 365, Microsoft Teams, .Net Platform and Microsoft BI. He is currently working Sr Microsoft Consultant at Olive + Goose. He is MCT Regional Lead for Pakistan Chapter since 2012. He is working on SharePoint for past 12 years and worked on different intranet/intranet solutions for private & govt. sector majorly in United states and Gulf region and have experience of working with multiple Fortune 500 companies. He is a trainer, technology evangelist and also speaks in community forums.

Leave a Reply

16 replies on “Changing site logo for all sub sites in a Site collection for SharePoint Online (Office 365)”

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