I do not have any servers with SP7 yet. I have a mix of nw6 and nw65
servers. The nw65 being anything from sp3 to sp6. I run ss204 on a couple
of the sp6 servers. Some of my root servers where Universal Password
authentication occurs are still only running ss203.

I am running eDirectory 8.7.x

If I patch my first sp6 server to sp7, will the schema modifications mess
up the root servers running ss203 only? Are there any schema
modifications from sp6 to sp7?

I want to patch a non-critical server first, then simply start rolling
out sp7 rather than upgrading to ss204 to solve some nmas issues from