With the release of UAG SP4 that gives support for Windows 8.1 and Internet Explorer 11 clients I have had a few people ask me about why their pre-upgrade configuration has disappeared.The simple answer is that the configuration schema has changed between the updates and hence it does not import back in.    There is a simple solution though, use the UAGSchemaUpdateUtil.exe utility in c:\program files\Microsoft forefront unified access gateway\common\bin this will upgrade the configuration to the latest schema and allow it to be restored back to your server.If you did not take a pre-upgrade configuration backup, shame on you, however the automatic backups are stored under c:\program files\Microsoft forefront unified access gateway\backup so you could upgrade the last configuration you activated.