Unfortunately there are some limitations in the connector (API) with Microsoft Planner, that impact the way we can read, write and synchronize comments between Placker and MS Planner.
MS Planner boards that are linked to a group in MS Planner
For MS Planner boards that are linked to a group in MS Planner, it is possible to:
Create comments in MS Planner when comments are created in Placker.
Create comments in MS Planner when a card (with comments) is added to the board in Placker
Create comments in Placker when the MS Planner board is imported into Placker.
It is NOT possible to synchronize the following actions:
Create a comment in Planner will not be created in Placker (because we don't receive this update from MS Planner).
This is because of limitations in the synchronization interface from Microsoft, comments are not included in the list of changes and can therefore also not be synced from MS Planner to Placker.
MS Planner boards that are not linked to a group in MS Planner.
When your MS Planner board is linked to a group in MS Planner, it is NOT possible to read, create or synchronize comments between Placker and MS Planner. You can still create comments in Placker.
This is because comments are linked to a group in MS Planner. When an MS Planner board is not linked to a group, it is not possible to create comments in MS Planner as a result.