Sync Trello and Microsoft Planner

Trello has no native connector to Microsoft Planner. A team that works across both — Trello for one group, Planner for another, or a shared team moving between the two after a platform migration — updates the same piece of work twice: once as a Trello card, once as a Planner task. Trello's own automation and Power-Ups reach other Trello boards, not a Microsoft 365 tenant, so there is no rule you can write inside Trello that touches a Planner plan. A status change on one side stays invisible on the other until somebody remembers to copy it across.

Placker imports the Trello board and the Microsoft Planner plan as two connected boards in the same workspace, then mirrors cards between them. A mirrored card keeps its own identity on each side — a Trello card with its checklists and labels, a Planner task with its bucket and assignment — while a shared set of fields (due date, assignee, status, labels) stays synchronised. Pair a handful of cards manually, or let a mirror rule watch the board and mirror automatically whenever a condition is met — the same rules engine used to mirror cards between two Trello boards.

Before anything syncs, a Microsoft 365 administrator has to authorise the Planner connector for the tenant. It's a one-time approval, but it blocks every user until it's granted, so raise it early. Once approved, connect your own Microsoft account from your Placker profile, then import the Planner plan the same way you'd import a second Trello board. From there, drag a Trello card onto the Planner task to create a manual mirror, or open the board's Rules tab and set a mirror rule with a trigger — a card entering a list, a label being added — and Mirror card as the action. Mirror settings govern exactly which fields travel, and offer a gentler mode that logs a Planner-side update as a comment instead of overwriting a field.

Nothing about how either team works has to change. The Trello side still drags cards across lists and runs its existing Power-Ups; the Planner side still uses buckets and My Tasks. What changes is that a status update, a reassignment or a new due date made on either card now shows up on the other without anyone sending a message about it. Two things are worth knowing going in: an edit made in Placker or Trello reaches Planner immediately, while an edit made directly in Planner arrives on Placker's next sync pass, so give it a moment before assuming it didn't take; and comments don't travel back from Planner, because Microsoft leaves comments out of the change feed Placker reads, so keep the discussion on one side.