Well it seems like someone in Dell has heard my call for help :) Here it is:   [URL]
We have a batch of PER 13G servers which have been upgraded from ESXi 6.5u1 to ESXi 6.7 GA and ever since, OMSA agent is not working on these ESXi servers, and we cannot manage them with OMIVV or OMSA Managed Node anymore. It is stated here: <ADMIN NOTE: Broken link has been removed from this post by Dell> that ESXi 6.7 is supported with OMSA 9.1.1, however, the only supported server models are PER840 and PER940xa. A few days ago, Dell EMC Systems Management Tools (containing OMSA agent) v.9.2.0 have been published for 13G servers and ESXi 6.7 is listed as supported, however, no packages for any ESXi version can be found inside the bundle. Dell VUM repository ([URL] still does not return any OMSA packages for ESXi 6.7 when requested through VUM. ESXi 6.7 GA is out for more than 6 months, which should be more than enough time to release an OMSA agent that supports this ESXi version for a broader range of Dell PER servers. When will the OMSA agent that supports ESXi 6.7 and 13G servers be released either through VUM, or as a VIB (zip) package ?
OpenManage Server Administrator (OMSA) support for ESXi 6.7