I have a Managed metadata list column which does not have a default value. The list has a couple of items for which these columns are currently set to empty. I have set a default value to the column after I have created these items. is it possible to set all the empty field values for the list items to the default value retrospectively?
For one time fixes, sometimes flipping over to datasheet view and doing a click & drag is the quickest way to make a bulk update.
You can kick off a workflow after the item has been added and let that workflow check specific fields on an empty value. If empty, fill it with your value.
It can be done via a eventhandler too, but I like the workflow more as I believe you can set it declarative.
Is this a one time thing? Or will the default be changing frequently and you want to modify a bulk amount?
Either way, you can write a powershell or .Net script which can loop through and update all the records accordingly. Unfortunately you can't use datasheet view for managed meta data fields.