SharePoint Online: PowerShell to Get All Subsites in a Site Collection

#Requirement: sharepoint online get all subsites powershell
#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"

#Variables
$SiteURL = "https://crescent.sharepoint.com/Sites/Marketing"

Try {
    #Get Credentials to connect
    $Cred= Get-Credential

    #Setup the context
    $Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
    $Ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
  
    #Get the web
    $Web = $Ctx.web
    $Ctx.Load($Web)
    
    #get all subsites in sharepoint online powershell
    $Ctx.Load($Web.Webs)
    $Ctx.executeQuery()

    #Loop through each subsite and get subsite URL
    ForEach ($Subweb in $web.Webs)  
    {
       Write-host $Subweb.url  
    }  
}
Catch {
    write-host -f Red "Error:" $_.Exception.Message
}

#Load SharePoint Online Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
  
##Variables for Processing
$SiteUrl = "https://crescent.sharepoint.com/sites/Sales/"
$UserName="Salaudeen@crescent.com"
$Password ="Password goes here"
 
#Setup Credentials to connect
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
 
#sharepoint online powershell get subsites
Function Get-SPOWeb() {
param(
    $WebURL = $(throw "Please Enter the Site Collection URL")
)

    #Get Web information and subsites
    $Context = New-Object Microsoft.SharePoint.Client.ClientContext($webURL)
    $Context.Credentials = $credentials
    $Web = $context.Web
    $Context.Load($web)

    #powershell cmdlet to retrieve sharepoint online subsites
    $Context.Load($web.Webs) 
    $Context.executeQuery()

    #Do something with the current sub-site
    Write-host $Web.URL

    #Iterate through each subsite in the current web
    foreach ($Subweb in $web.Webs)
    {
        #Call the function recursively to process all subsites underneath the current web
        Get-SPOWeb($Subweb.url)
    }
}

#Call the function
Get-SPOWeb -WebURL $SiteUrl

#Config Variables
$SiteURL = "https://Crescent.sharepoint.com"

#Get Credentials to connect
$Cred = Get-Credential

Try {
    #Connect to PnP Online
    Connect-PnPOnline -Url $SiteURL -Credentials $Cred

    #Get subsites in SharePoint Online using PnP PowerShell
    $WebsCollection = Get-PnPSubWeb -Recurse
    
    #Iterate through each subsite
    ForEach($Web in $WebsCollection)
    {
        Write-host $Web.Url
    }
}
catch {
    write-host "Error: $($_.Exception.Message)" -foregroundcolor Red
}

#Parameter
$SiteURL = "https://crescent.sharepoint.com/sites/marketing" 

Try {
    #Connect to PnP Online
    Connect-PnPOnline -Url $SiteURL -Interactive
 
    #Get all webs in SharePoint Online site using PnP PowerShell
    $WebsCollection = Get-PnPSubWeb -Recurse -IncludeRootWeb
     
    #Iterate through each web in site
    ForEach($Web in $WebsCollection)
    {
        Write-host $Web.Url
    }
}
catch {
    write-host "Error: $($_.Exception.Message)" -foregroundcolor Red
}