Yes. After you create the SharePoint folder, generate a sharing link for that folder and write it into the task’s References (attachments) via Planner --> Update task details. Planner treats “attachments” as links (references), so you don’t upload a folder, you store a URL (alias + resourceLink).
How to do it
1. Create the folder (your flow already does this).
2. Create a sharing link for the folder
Action: SharePoint --> Create sharing link for a file or folder
Point it at the same site/library and the newly created folder. Choose link type/scope that fits your sharing model (e.g., View/Edit + People in your organization).
This returns a URL you’ll use as the attachment.
3. Create or locate the Planner task
Action: Planner --> Create a task (or capture the Task Id from earlier in the flow).
(Note: the out‑of‑box Planner connector manages “basic” plans; attachments are still added via Update task details references. If you are strictly on Planner Premium/Loop, this still works when the plan is surfaced in Planner; otherwise you’d use Graph.)
4. Attach the SharePoint folder link to the task
Action: Planner --> Update task details
In References:
Reference alias 1 = e.g., “Project Files”
Reference resource link 1 = (sharing link URL from step 2)
That renders as an “attachment” tile in Planner.
Tip (multiple links): Build an array of { "alias": "<Name>", "resourceLink": "<URL>" } and pass it to Update task details to add 0‑N attachments at once.
Why this works?
Planner “attachments” are References (URLs to SharePoint/OneDrive/web). Power Automate exposes these in Update task details --> References, which is the supported way to add links programmatically.
Additional References:
✅ If this answer helped resolve your issue, please mark it as Accepted so it can help others with the same problem.
👍 Feel free to Like the post if you found it useful.