Currently, if you want to assign a snapshot store to a certain project, it is required to access the Admin view and configure the "Assignment Labels" property under Backup > Snapshot Storage with the name of the corresponding project. AFAIK, it is not possible to assign this configuration in the Ops Manager's YAML. E.g.: s3Stores: - mongodbResourceRef: name: s3-metadata-db mongodbUserRef: name: s3-meta-store-user name: s3store1 pathStyleAccessEnabled: false s3BucketEndpoint: endpoint1.corp s3BucketName: backup1-bucket s3SecretRef: name: s3-credentials - mongodbResourceRef: name: s3-metadata-db mongodbUserRef: name: s3-meta-store-user name: s3store2 pathStyleAccessEnabled: false s3BucketEndpoint: backup2.corp s3BucketName: backup2-bucket s3SecretRef: name: second-credentials