WebSphere 6.1 SSL certificate expirations

I had a Deployment Manager with two remote nodes federated into it and had left them switched off for over a year now. When I restarted the Deployment Manager the new certificate expiration handling process had renewed the certificates within the /config/cells/CELL_NAME/trust.p12 and /config/cells/CELL_NAME/key.p12 files. Unfortunately the certificates on the nodeagents had expired by then …