Hi,
Please refer to this sample request:
http://yourorganization.crm4.dynamics.com/api/data/v9.0/RelationshipDefinitions/Microsoft.Dynamics.CRM.OneToManyRelationshipMetadata?$select=CascadeConfiguration&$filter=SchemaName eq 'account_primary_contact'
You will get something like:
{
"@odata.context": "https://yourOrganization.crm4.dynamics.com/api/data/v9.0/$metadata#RelationshipDefinitions(CascadeConfiguration)",
"value": [
{
"MetadataId": "410707b1-9554-4cd9-8437-6608b1802904",
"CascadeConfiguration": {
"Assign": "NoCascade",
"Delete": "RemoveLink",
"Merge": "Cascade",
"Reparent": "NoCascade",
"Share": "NoCascade",
"Unshare": "NoCascade",
"RollupView": "NoCascade"
}
}
]
}
