The old environment was:
- IIS 7.5
- Windows Server 2008
- SQL Server instance on the same server
The new environment is:
- IIS 8.0
- Windows Server 2012
- SQL Server instance on AWS RDS
The site-level settings are set to inherit from global.
After several days, nothing has changed. Everything's working fine, except that check-in/check-out no longer appears.