The document summarizes several case studies of worst practices in IBM Lotus Domino configurations that caused problems. The first case involved an administrator accidentally replacing the design of the Domino directory with a mail file template, locking users out of mail routing and replication. The second case discussed allowing roaming profiles on network home drives, which caused all users to see each other's address books due to duplicate replica IDs. Subsequent cases highlighted issues with certificate management, enabling public key checking too close to go-live, unsupervised scheduled agents modifying millions of documents hourly, hardcoded path dependencies in migrated applications, and overcomplicated replication topologies overwhelming server resources. The document stresses the importance of access control, change management, testing changes, and