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You cannot upgrade to NIOS 9.0.4 from NIOS 8.3.x and earlier releases.
Before upgrading the Grid to NIOS 9.0.4, once the Grid with the NIOS 9.0.4 version is distributed, you must apply the NIOS CHF-9.0.4.1 (Hotfix 1) and then complete the rest of the upgrade process. The CHF-9.0.4.1 (Hotfix 1) is downloadable from https://support.infoblox.com/s/downloads
To ensure that new features and enhancements operate properly and smoothly, Infoblox recommends that you evaluate the capacity on your Grid and review the upgrade guidelines before you upgrade from a previous NIOS release.
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