Cannot get port 445 open

We have two "firewalls" in our company, Bitdefender GravityZone & our router. I've added a Firewall rule under the policy our PCs are on, and I disabled the router firewall for testing (Asus routers are a pain in the A for opening ports). Despite this, port 445 remains closed.

We do not use Windows Firewall, Bitdefender has taken over as the firewall. We need access to port 445 so we can mount a network drive from Azure Storage.