Change Farm Level Property Bag using PowerShell

Property bag is simply thw properties of web site, site collection, web application and farm. So in order to interact with the PropertyBags in PowerShell, just use the related object’s Propeties member. In the following example I used the farm object’s Properties member to edit farm level property bag. So you can modify this script to use web site, site collection or web application.

    [string]$WebApplicationUrl = ""

Remove-PSSnapin Microsoft.SharePoint.PowerShell -erroraction SilentlyContinue
Add-PSSnapin Microsoft.SharePoint.PowerShell -erroraction SilentlyContinue

Function ConfigureFarmPropertyBag([string]$propName, [string]$propValue)
	$web = Get-SPFarm
	if (!$web.Properties.ContainsKey($propName)) 
		Write-Host -foregroundcolor yellow "- The '$propName' property bag couldn't be found."
		$web.Properties.Add($propName, $propValue);
		Write-Host -foregroundcolor white "- The value of the '$propName' property bag is added"
		Write-Host -foregroundcolor yellow "- The current value of the '$propName' property bag is " $web.Properties[$propName] "."
		$web.Properties[$propName] = $propValue; 
		Write-Host -foregroundcolor white "- The value of the '$propName' property bag is changed"

If (!([string]::IsNullOrEmpty($WebApplicationUrl)))
	#Updating property bag
	Write-Host -Foregroundcolor Green "- Starting to add new parameters to the farm's property bag"
	ConfigureFarmPropertyBag "[PropName]" [PropValue]
	Write-Host -foregroundcolor Green "- Farm property bag values are updated"
	Throw " - Please provide the web application url parameter -WebApplicationUrl"


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