Azure
Portal
https://portal.azure.com
Azure Migration Center
https://azure.microsoft.com/en-us/migration/
Azure Migration White Paper
https://azure.microsoft.com/en-us/resources/choosing-your-database-migration-path-to-azure/
Supported Version & Edition Upgrades
2014
https://technet.microsoft.com/en-us/library/ms143393(v=sql.120).aspx
2012
https://technet.microsoft.com/en-us/library/ms143393(v=sql.110).aspx
Supported Features
2017
https://docs.microsoft.com/en-us/sql/sql-server/editions-and-components-of-sql-server-2017
2016
https://docs.microsoft.com/en-gb/sql/sql-server/editions-and-components-of-sql-server-2016
2014
https://msdn.microsoft.com/en-us/library/cc645993(v=sql.120).aspx
2012
https://msdn.microsoft.com/en-us/library/cc645993(v=sql.110).aspx
2008-R2
https://msdn.microsoft.com/en-gb/library/cc645993(v=sql.105).aspx
2008
https://msdn.microsoft.com/en-us/library/cc645993(v=sql.100).aspx
Build Versions
https://sqlserverbuilds.blogspot.co.uk/