Our phone system uses option 66 / boot-server to get the phone configuration. the phone expects the boot server as a http url.
The string the phones need to get is http://server/folder/$MA.xml
I was trying to do that with boot-server and boot-file but the phones are not getting the setting.
In windows DHCP I set a scope option of 66 boot server host name and the string value is "http://phoneserver/provisioning/xqw1d6f045/$MA.xml"