Under what circumstances would the OX and OM openly share information/weapon/relic/tech?
I am drafting a campaign, and the simplest answer I came up with was: Not all Inquisitor's are shrouded in secrecy and distrust of one another.
Some are even friends. I know it seems like a stretch but that is why I am here =) To come up with a good reason.
Perhaps they expect to repaid, often immediately.