I've taken the first stab at building auto-provisioning files for Polycom KWS300. The files can be downloaded for a limited period from:
Requires at least firmware PCS03
Label field is (mis)used for handset IPEI numbers. They must be written exactly like this without quotes: "00077 05501360"
Even though dhcp is selected as configuration for network, all xml tags for network must be present for networking to work properly.
Provisioning settings will be cleared/overwritten when mac-config.xml is deployed during provisioning. It is not possible to preserve provisioning settings by leaving out xml tags regarding provisioning.
It seems that it refuses to download mac-users.xml if firmware .bin file is unavailable.
After provisioning all handsets needs to activated manually to work.