Fix “Property does not exist” error when add search scope rule in Sharepoint

If you configure search scope based on some managed property (e.f. ContentType) via PowerShell using New-SPEnterpriseSearchQueryScopeRule cmdlet, e.g. using the following code:

   1: New-SPEnterpriseSearchQueryScopeRule -Scope $scope -RuleType $ruleType -FilterBehavior

   2: $filterBehavior -ManagedProperty $parameter -PropertyValue $value -Url

   3: $url -SearchApplication $searchApplication -Confirm:$false

You may get the following error:

Property "ContentType" does not exist

In order to fix it go to Central Administration > Service applications > Search service application > Metadata properties > Edit "Content type" property (or property which you use) > Check checkbox "Allow this property to be used in scopes":

After this New-SPEnterpriseSearchQueryScopeRule cmdlet should work successfully.