vCenter 6.0 FQDN redirect to local name from Internet

Hi!

We have vCenter 6.0 working normally but it has a local hostname (vCenter.domain.local). This was build by an employee that left the company. I need to open the web client to the web (with Inbound filter) but my issue is that anytime I access the external IP or the external FQDN, it redirect to the local name, so it doesn't work.

https://vcenter.domain.local/websso/SAML2/SSOSSL?RelyingPartyEntityId=aHR0cHM6Ly8yMDYuNDEuOTUuMjU0OjQ0NDMvdnNwaGVyZS…

How can I fix this, without breaking anything?

Thanks for any help