SAP EarlyWatch Alert (EWA)
SAP EarlyWatch Alert is a good indicator for the functioning of the RFC connections. If there is a small red flag in the solution overview of transaction SOLUTION_MANAGER, something is wrong with the EWA data collection.
In this case, check in the solution, which system in the landscape is affected, and check the RFC connections and SDCC. For further information, see SAP Note 216952 “Service Data Control Center (SDCC) – FAQ”. If the EWA is grey in the overview, there is also a problem.
For more information, see SAP Note 762696 “Grey rating for EarlyWatch Alert”.