thanks for the help, the upgrade is running. i'm starting from the Access point joined to controller first and then i'll upgrade the virtual controller.
You can go directly from 5.7.x to 5.8.x. The release notes will provide you with the upgrade steps and information. There is no need for an intermediary version.
You can safely upgrade from WiNG 5.7.x to WiNG 5.8.x. No intermediate step up upgrade is required. You can review/download the WiNG 5.8.6 release notes at the following link: