TL;DR: Keep communication and mirrored data consistent across connected items. Copy updates (comments) to all linked items, or push the value of a Mirror column into a regular column you can act on with other automations. monday has no native cross-board sync — Mirror columns only display values, they can't be edited or trigger most automations.
When to use these automations
Conversations posted on one item should follow the work to linked items on other boards
You want to act on Mirror column values (e.g. trigger other automations) — Mirror columns are read-only, so copy the value to a real column first
For the mirror-copy recipe: a Mirror column on this board pointing at the source column on the connected board, plus a destination column with the same name and type as the source
Pick the recipe that fits your workflow
1. When an update is posted, copy to connected items
Recipe:"When mirror column changes, copy that value to the column in this board where column name and type match."
Mirror columns in monday.com are read-only — you can see the value but can't act on it with most native automations. This recipe pushes the mirrored value into a real column on this board, so the value is now usable as a trigger for further automations or as part of formulas.
Use when: a status from another board is mirrored here and you want to route based on it, OR you want to "snapshot" the mirror value for reporting.
Set it up
Open Automate → Create, search Connected Boards Automations, find this recipe, click Use template.
Pick the Mirror column on this board you want to monitor.
Click Create automation. The value will be copied to the matching real column (same name and type) automatically.
Copy mirror column value — field setup
Common gotchas
Each update consumes 1 action per connected item. Posting one update on an item linked to 10 connected items uses 10 actions from your quota.
"Same name and type" for mirror-to-column copy. The destination column on this board must match the source column on the original board exactly.
Updates are one-way. Replies posted on connected items don't flow back. Set up the recipe on both boards if bidirectional update sync is needed.
The connection must already exist. Both recipes assume items are already linked.