Be aware of the following caveats when upgrading an OES server:
Other Novell products, such as GroupWise, and third-party applications that you have installed are treated differently by default when you upgrade an OES server, depending on the version of the server you are upgrading.
To learn more and for instructions on manually changing these options, see Planning for the Upgrade to OES 2015 SP1
in the OES 2015 SP1: Installation Guide.
If your OES server has multiple instances of eDirectory running (multiple trees), any attempt to upgrade the server fails.
You must remove all instances, except the one that uses port 524, prior to an upgrade.
For more information, see Section 6.6.5, One Instance Only.