You are using SAP NetWeaver Identity Management 7.1. After updating the servers to use 3DES encryption you encounter connectivity issues with the database, for example, "Could not create connection to the database null" or authentication failure towards backends.
Troubleshooting, Identity Management, ID Mgmt,IC, Identity Center
Ensure that the keys.ini file is distributed correctly to all necessary locations. For more information, see the SAP Note.