Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
2.7.0
Describe the issue:
Is it possible to configure a channel in OpenSearch for use with Slack Incoming Webhooks (legacy, not API) that can point to a specific channel? Currently, the vanilla slack webhooks work but can only point to the default channel, even though I know it is possible to point to a channel with the channel or channel_id parameters with other services.
Making a Custom Webhook with these parameters only results in an Invalid_Payload error.