Hi,
I just upgraded a vcenter 5.5 installed on windows 2012 which uses a MS-SQL 2008 R2 express database.
The vCenter database was converted to postgres as expected and the upgrade went fine.
I disabled the MS-SQL services on this vcenter and rebootet it.
After the reboot the inventory service did not start so the vcenter service did also not start.
I set the MS-SQL services back to start automaticly and all vmware services are starting as aspected after a reboot.
So it seems the inventory service still uses the MS-SQL DBs in some way.
Is this aspected? I wanted to delete all MS-SQL related programms an this vcenter.