The Script below will list the version status of every site in your farm.
Note that as the script is below, it only reports, you’ll need to uncomment 3 lines if you want it to make the changes.

It’s a good idea to run the script once or twice before you do that, so you have a log of what settings were.

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Add-PSSnapin microsoft.sharepoint.powershell -ErrorAction SilentlyContinue
 
$timestamp = get-date -format "yyyMMdd_hhmmtt"
$filenameprefix = "VersionScriptoutput"
$logfile = ("{0}_{1}.csv" -f $filenameprefix, $timestamp)
 
$header = "ListURL,Enabled"
$header | out-file -filepath $logfile
 
# tip - the script as is will pull every sharepoint site (at the IIS level) in your farm.
# if you want to filter this to a single IIS site,
# remove the # from the middle of the next line and enter your site's url
 
$iissitelist = get-spwebapplication # | where {$_.url -eq "https://www.yoursite.com/"}
foreach ($iissite in $iissitelist)
{
	foreach ($SiteCollection in $iissite.sites)
	{
		write-host $SiteCollection -foregroundcolor Blue
		foreach ($oneweb in $SiteCollection.allwebs)
		{
		   write-host  $iissite.url $oneweb -foregroundcolor Green
		   #now this is is where we look at the lists
		   $lists = $oneweb.lists
		   foreach ($list in $lists)
		   {
			  if($list.EnableVersioning -eq $false)
			  {
				  write-host  $iissite.url $oneweb"/"$list"/ is a not using versions" -foregroundcolor yellow
				  $msg = ("{0}/{1},false" -f  $oneweb.url, $list.rootfolder)	
			           $msg | out-file -filepath $logfile -append
                                       # note!
                                       # if you actually want to make the changes, uncomment the next 3 lines!
				  #$list.Enableversioning = $true
				  #$List.MajorVersionLimit = 3
				  #$list.update()
			  }
			  else
			  {
				  Write-host  $iissite.url $oneweb"/"$list"/ has versions enabled! "
				  $msg = ("{0}/{1},true" -f  $oneweb.url,$list.rootfolder)				  
                                       $msg | out-file -filepath $logfile -append
			  }
		   } 
		}
	}
}