When I attempted to upgrade our OES 11 SP2 server to OES 2015 SP1 I encountered a problem with eDirectory.

The eDirectory upgrade requires the IP address/hostname of an eDirectory server that holds a replica of the context of the server being upgraded.

However, we only run eDirectory on one server so I cannot get beyond this point.

My questions are:

1. Is it safe to upgrade OES while leaving eDirectory on it's current version (at least temporarily)?

2. Is there a way of upgrading eDirectory when a replica is not available?