StorSimple as WORM Storage
One customer of me asked if it is possible to save data in a way that the saved data is audit compliant (change of data written to StorSimple not possible, i. e. for accounting data). Actually 3rd party software needed.
Maybe an option for a future release.
Sudarshan Yadav commented
Thanks for the suggestion. To achieve this, you will need a third party software like iTernity.
Mike Thomas commented
StoneFly.com or iSCSI.com has the Worm Storage solution for Azure.