Hi @Rexcily_Rijo_R

If you want to resync a node open a support ticket with MongoDB Atlas Support. This is not available to MongoDB Atlas users.

Additional members can be added and a cluster can be reduced back down to 3 members using the options in Multi-Cloud, Multi-Region & Workload Isolation

ref: https://www.mongodb.com/docs/atlas/cluster-config/multi-cloud-distribution/#configure-high-availability-and-workload-isolation

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