On the browser tab for the Search service resource in the Azure portal, enable the managed identity:
- From the left pane, under Settings, select Identity.
- Switch Status to On.
- Select Save.
On the browser tab for the Azure AI services resource in the Azure portal, enable the managed identity:
- From the left pane, under Resource Management, select Identity.
- Switch Status to On.
- Select Save.
Assigned roles as per below doc suggests. GitHub
Thank You.