[jordicarbo]

Todo lo posteado por Koletas y johangonz es correcto.
Debo añadir que SAP solo reporta EWA si tu entorno esta registrado como Producción.
Si quieres obtener EWA de entornos de Desarrollo o PreProducción, es necesario tener el Solution Manager, y eso ya seria otro tema...

Aquí tienes la info que da SAP
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Dear Customer,


We have received SAP EarlyWatch Alert data packages from your SAP system containing the parameters DAM (customer number xxxxxxxxxx, installation number xxxxxxxxxxxxxx).

Since January 1, 2006, SAP no longer processes SAP EarlyWatch Alert data from IDES, demo and development systems. SAP EarlyWatch Alert processing and reporting can now be completed in SAP Solution Manager only.

Using SAP Solution Manager gives you the following advantages in monitoring your system landscape with SAP EarlyWatch Alert:

Graphical depiction of your system landscape and a central storage location for SAP EarlyWatch Alert reports
Real-time creation of reports and simple archiving (not available if your SAP EarlyWatch Alerts are handled by SAP)
Service Level Management tailored to your company's individual requirements
Lower data transfer costs

You can find information on activating SAP EarlyWatch Alerts in SAP Solution Manager in the Configuration Guide. If you have not yet installed SAP Solution Manager and would like more information, visit the quick link /solutionmanager in the SAP Support Portal.

If your SAP system has been classified incorrectly, you can modify your system type on the System Data Maintenance page in the SAP Support Portal (quick link /system-data).

Please also note that from February 6, 2006, SAP is only able to process SAP EarlyWatch Alert data from customers who use load balancing. Please check this by checking your RFC connections to SAP. (To do so, follow the instructions contained in SAP Note 812386.)

Detailed information on this topic can be found under the quick link /ewa-strategy.

Thank you in advance for your support in this matter.

Sincerely,
SAP Active Global Support