[mrunkel]

There are many ways to solve this that don't require uniqueness across all systems.

https://${customer}.hubspot.com/... https://app.hubspot.com/${customer}/...

You'd do this at the proxy/forwarder level.

[gomox]

Everything has a solution, but want to bet that at least 20 different internal systems at HubSpot assume that the account ID in that URL is globally unique?