well random website sellers, no provisioning server (till the one just created), just simple sip account info
single field in the webui is currently pointed to my lan server...
however there are a few references to those entries in Config/site.cfg Config/polycomConfig.xsd Config/device.cfg I can try tweaking (but some entries are for the software upgrade tab > polycom hosted vs custom)
trying the clear upgrade server method
Successfully cleared the Upgrade Server configuration, From now onwards phone uses Provisioning Server for software image.