WHen you copy mac-address of phone from CatOS, it puts dashes in the macaddress (00-xx-xx-xx-xx-xx). You can use this mac-address as such in DHCP server (MS)
When you copy mac-address of phone from IOS switch, it puts dots after 4 digits of mac-address (0000.0000.0000). YOu have to remove the dots.
MS DHCP server will accept dashes between hex digits or hex digits with out spaces