When installing vCenter Server 5.1.0 on a Windows Server 2012 machine while selecting the supplied SQL Server Express edition for database error 32010 is displayed.
Error 32010. Failed to create database users. There can be several reasons for this failure.
The logfile vmMSSQLCmd.log revealed that the passwords used for the RSA_user and RSA_DBA where not complex enough.
After setting a more complex password in the screens below the installation continued without any issues.
It is beyond me why VMware does not provide a check immediately after typing in the password. There is a check on complexity of password for the vCenter Single Sign On administrator database useraccount.