Hi @Pat, 
Analyzing the problem I came to the following conclusions, see if this helps you: there isn’t a public REST endpoint to set ACLs on Alerts v2. The Alerts API only supports CRUD operations (create, list, update, delete) but not permissions. A workaround is to manage permissions at the folder level and let the alert inherit them using the Workspace Permissions API (https://docs.databricks.com/api/workspace/permissions).

The SQL Permissions API is currently read-only, so it can’t set ACLs on alerts. If your challenge is service principal visibility or execution, you can configure the alert to run as a specific user/SP via the Alerts v2 update (https://api-reference.cloud.databricks.com
). The /ajax-api/2.0/accesspolicies endpoint is UI-internal and not officially supported.