This article explains the vSphere Update Manager - vSAN build recommendation check in the vSAN Health Service and provides details about why it might report an error.

This informational check notifies you that a vSAN build is available for upgrade. This is the ESXi build that vSAN recommends to be the most appropriate, based on the cluster hardware, compatibility, and the available releases from VMware.

VMware vSAN 6.6.x
VMware vSAN 7.0.x

Q: What does the vSAN build recommendation do?

Checks for an ESXi release build recommendation for the cluster.

Q: What does it mean when this check is populated?

It displays the build version recommended for the cluster to be upgraded to by the user's preferred method.

Note: For VCF environments be sure to use SDDC Manager for the upgrade. For VxRail environments be sure to use VxRail Manager for the upgrade.