Jay,
Auto-Discovery should only be enabled if using CDP phones or a mix of LLDP-MED and CDP phones. With only LLDP-MED phones, static (which is the default) would be the prefered method.
That said, can you give me more details on the Polycom LYNC phone, specifically model and firmware version? When the phone does not end up in the right vlan, what do the following outputs show?
show interface gigabitethernet <INTERFACE OF PHONE> switchport extensive
show neighbor-devices phones
Best regards,
Madani