I would like to share that the mínimum versión of SharePoint supported on Windows Azure:
- SharePoint 2010 SP1 + CU and onwards.
- SharePoint 2013 RTM and onwards.
- Fast Server over SPS 2010
- WSS 3.0, MOSS 2007
For more information please check the following page.
Héctor Calvarro Martín. SharePoint Dev/Core. Microsoft Support Escalation Engineer for EMEA