We have installed and configured VMware Update Manager Download Service which work fine for downloading patches and extensions. To this repo we have connected several vcenter servers. vCenter and VUM/UMDS is all running version 6.
Now, I'm going to upgrade a lot of hosts from 5.5 to 6U1b or 6U2. In that case I want to put the Dell Customized ISO/Offline bundle on the repo/UMDS server and create the baseline from that. I can't find much informarmation about UMDS, and nothing about what I want to do. So, does anyone know if it's possible, or is it only possible to import the ESXi image though VUM on each vcenter/vum instance ?
Your Update Manager needs to be running a version the same as or higher that the ESXi version that you want to upgrade the hosts to. https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2097168
So in your case, ensure that update manager is running 6Ux (ESXi target version or higher)