Use external groups in the ACL PUT https://graph.microsoft.com/beta/external/connections/{id}/items/{id} Content-type: application/ json { "@ odata.type ": " microsoft.graph.externalItem ", " acl ": [ { "type": "group", "value": " contosEscalations ", " accessType ": "grant", " identitySource ": "External" }, { "type": "user", "value": "87e9089a-08d5-4d9e-9524-b7bd6be580d5", " accessType ": "grant", " identitySource ": " azureActiveDirectory " }, { "type": "group", "value": "96fbeb4f-f71c-4405-9f0b-1d6988eda2d2", " accessType ": "deny", " identitySource ": " azureActiveDirectory " } ], "properties": { "title": "Error in the payment gateway", "priority": 1, "assignee": "
[email protected]" }, "content": { "value": "<h1>Error in payment gateway</h1><p>Error details...</p>", "type": "html" } } https://learn.microsoft.com/en-us/graph/connecting-external-content-external-groups