LockState NoAccess for all

F0RCE 

Uncomment lines for O365

# Required for SharePoint 2010. You May need to open PowerShell and Run this first before
# Executing this script

#C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Version 2.0 -NoExit " & ' C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\CONFIG\POWERSHELL\Registration\\sharepoint.ps1 ' "

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
Write-Host "Microsoft.SharePoint.PowerShell Snap-In Added..." -ForegroundColor Green
Write-Host
#*******************************************************************************

#State has one of the following values:

#Unlock to unlock the site collection and make it available to users.
#NoAdditions to prevent users from adding new content to the site collection. Updates and deletions are still allowed.
#ReadOnly to prevent users from adding, updating, or deleting content.
#NoAccess to prevent users from accessing the site collection and its content. Users who attempt to access the site receive an error

#O365 Example
#$siteUrl = "https://YOURTENANT-admin.sharepoint.com"
#Connect-SPOService -Url $siteUrl

#$site = "https://YOURTENANT.sharepoint.com"
#Set-SPOSite -Identity $site -LockState "NoAccess"

#*******************************************************************************

#stsadm -o setsitelock -url <Site-collection-url> -lock NoAccess
#Set-SPSite -Identity http://sharepoint-sitecollection-url -LockState NoAccess

#*******************************************************************************
#*******************************************************************************

#Select Web Application or Site Collection
$ApplyToWebApp = Read-Host "Application to Web Application (Y/N)?"

#*******************************************************************************
#* Apply To Web Application
#*******************************************************************************

if ($ApplyToWebApp -eq 'Y')
{
#Set the Web application URL
$WebAppURL = Read-Host "Enter the Web Application Url [http://portal.contoso.com]" `n
$lockState = Read-Host "Select the LockState [Unlock,NoAdditions,ReadOnly,NoAccess]"?

#Get the Web Application
$WebApp = Get-SPWebApplication $WebAppURL

#Get all Site Collections from the Web Application
$SitesCollection = $WebApp.Sites

#Enumerate all site collections in the web application
Foreach($Site in $SitesCollection)
{
#Get Site Collection URL, Owner, Content Database Details
#Write-host $Site.URL

Set-SPSite -Identity $Site -LockState $lockState
Write-Host
Write-Host "Lock Status set to " $lockState " for " $Site -ForegroundColor Green
Write-Host

$Site.Dispose()
}
}
else
{
#*******************************************************************************
#* Apply To Site Collection
#*******************************************************************************

#Set the Web application URL
$SiteColURL = Read-Host "Enter the Site Collection Url [http://portal.contoso.com]" `n
$lockState = Read-Host "Select the LockState [Unlock,NoAdditions,ReadOnly,NoAccess]"?

Set-SPSite -Identity $SiteColURL -LockState $lockState
Write-Host
Write-Host "Lock Status set to " $lockState " for " $SiteColURL -ForegroundColor Green
Write-Host
}