Specifies the subset of print servers that will be queried for server printers. This applies only to the DeviceExternalPrintServers policy.
If this policy is used, only the server printers with ids matching the values in this policy are available to the user through device policy.
The ids must correspond to the "id" field in the file specified in DeviceExternalPrintServers.
If this policy is not set, filtering is omitted and all print servers provided by DeviceExternalPrintServers are taken into account.