I have a few servers with 7.0.3, and am about to do an upgrade to 8.0.1.

Server1 has the primary domain, a secondary domain, and 1 PO.
Server2 has a PO from the secondary domain mentioned on Server1 and contains my libraries.
I then have quite a few servers that have domains and PO's on them.

If I upgrade my primary and secondary domains and PO's on the Server1, will my users on Server1 and all my other 7.0.3 users on other servers still be able to access libraries on Server2 ?

I'm planning on upgrading Server1, then leaving things for a few days.