We can't access shared folders from one domain to another via UNC path. Does a trust need to be setup?

Hi guys,

We have a server that consists of shared folders that people are able to access by typing the UNC path. This server is on the IP 128.1.1.189 and is on the domain ‘matches.local’. So I am able to access this share and I am on the uk.fc.local domain. There is a trust between matches.local and uk.fc.local.

However, those in the US who are on the us.fc.local domain even though they can ping the server are unable to access this share. It doesn’t show when they type it in the search field like \\128.1.1.189\Sharedfolder.

Would this be down to the fact that there are no trusts between the matches.local domain and us.fc.local domain?

Thanks
Yash