I know this is a really old post, but I've recently ran into an issue where vCenter blocks us at 50 connections via the API. I've added the maxConnecionCount tag set to 100 under vmdb, but we're still getting the error of 50 max connections. Where should this be nested? I have it under config right now, but wasn't sure if it needs to be under vpxd or anything. We're running 5.1, fwiw.
I know SRM has a tag for the external API connection limit, is there one similar for vCenter?