If you connect to vCenter Server 5.1 or 5.5, Veeam MP/SPI 5.7 will not collect some data, including hardware sensor metrics and vCenter-specific events and properties that were introduced by VMware since VMware vSphere 4.0. vCenter events and properties that were introduced before VMware vSphere 4.0 will be collected without errors.
Although as per the system requirements the Veeam MP/SPI 5.7 does not support the VMware vSphere 5.1/5.5 platforms, it is possible to configure a connection to vCenter Server 5.1/5.5 in the Enterprise Manager Web UI.
With this patch applied, nworks 5.7 MP/SPI are compatible with all vSphere 5.x versions. All functionality introduced for support of vSphere 5.0 will be available. Note that no additional events or metrics specific to vSphere 5.1/5.5 will be collected.
Note, that once the patch is applied, you will see a warning in nworks UI, because the collector version will be later than that of the Enterprise Manager. The warning is expected and does not indicate any issue; it can be safely ignored.