Associate Multiple Site Collections to Hub Site

# Parameters

# Provide SharePoint online Hub site URL
$HubSiteURL = "https://******.sharepoint.com/sites/**********"

# Array of site collections to associate with hub site
$arrSCs = @("https://******.sharepoint.com/sites/**********", "https://******.sharepoint.com/sites/**********", "https://******.sharepoint.com/sites/**********")

# Get admin user credentials
$creds = (Get-Credential)

function AssociateHubSite {
	try {
		foreach ($SC in $arrSCs) { 
			Write-Host "Connecting site collection: " $SC 
			Connect-PnPOnline -Url $SC -Credentials $creds
			Add-PnPHubSiteAssociation -Site $SC -HubSite $HubSiteURL -ErrorAction Stop
			Write-Host "Hub site associated with site collection: " $SC -ForegroundColor Green            
		}
	}
	catch {
		Write-Host "Error in associating hub site $($SC): " $_.Exception.Message -ForegroundColor Red
	}   
	
	# Disconnect SharePoint online connection
	Disconnect-PnPOnline
}

AssociateHubSite

# SharePoint tenant admin site collection URL
$adminSiteUrl = "https://contoso-admin.sharepoint.com"

# SharePoint online Hub site URL
$hubSiteURL = "https://contoso.sharepoint.com/sites/communicationhubsite"

# Array of site collections to associate with hub site
$arrayOfSites = @("https://contoso.sharepoint.com/sites/siteA", "https://contoso.sharepoint.com/sites/siteB", "https://contoso.sharepoint.com/sites/siteC")

# Connect to SharePoint Online admin site  
Connect-SPOService -Url $adminSiteUrl

function AssociateHubSite {
	try {
		foreach ($site in $arrayOfSites) { 
			Write-Host "Associating site collection: " $site 
			
			# Associating site collection with hub site
			Add-SPOHubSiteAssociation -Site $site -HubSite $hubSiteURL -ErrorAction Stop
			
			Write-Host "Hub site associated with site collection: " $site -ForegroundColor Green            
		}
	}
	catch {
		Write-Host "Error in associating hub site $($site): " $_.Exception.Message -ForegroundColor Red
	}   
	
	# Disconnect SharePoint online connection
	Disconnect-SPOService
}

AssociateHubSite

# SharePoint online Hub site URL
$hubSiteURL = "https://contoso.sharepoint.com/sites/communicationhubsite"

# Array of site collections to associate site with hub site
$arrayOfSites = @("https://contoso.sharepoint.com/sites/siteA", "https://contoso.sharepoint.com/sites/siteB", "https://contoso.sharepoint.com/sites/siteC")

# Get Credentials to connect
$m365Status = m365 status
if ($m365Status -match "Logged Out") {
   m365 login
}

# Get information about the specified hub site
$hubSiteDetails = m365 spo hubsite get --url $hubSiteURL | ConvertFrom-Json

function AssociateHubSite {
	try {
		foreach ($site in $arrayOfSites) { 
			Write-Host "Associating site collection: " $site 
			
			# Associating site collection with hub site
			m365 spo site hubsite connect --siteUrl $site --id $hubSiteDetails.ID
			
			Write-Host "Hub site associated with site collection: " $site -ForegroundColor Green            
		}
	}
	catch {
		Write-Host "Error in associating hub site $($site): " $_.Exception.Message -ForegroundColor Red
	}   
	
	# Disconnect SharePoint online connection
	m365 logout
}

AssociateHubSite