H1B petition and visa expired and unused. Cap-Exempt eligible ?

I had a H1B petition with validity from Oct 2016 to Dec 2017. Got the visa stamped as well - valid till Dec 2017 - same as petition expiry date.

Did not travel to US at all.

Continuing with the same employer. Is my case eligible for cap-exemption ?

Yes, upto 6 years of the expiration date