Hello @Brandon_Foster,
The problem with this is Atlas will default a CIDR unless peering is established prior to building clusters in the project.
The best solution to this situation is as follows:
- Create new project
- Set up peering in new project
- Create new cluster
- Use migration to migrate data to new cluster
- Switch apps to new cluster
- Delete old cluster and project
The other way to correct this, but it would incur extra costs is by using private endpoints.
Regards,
Brock