The “Last Updated” timestamp on a matter will refresh whenever one of the following actions occurs:
Creating a new matter
Renaming a matter or changing its icon
Adding or removing tags from a matter
Updating the billing ID or custom fields on a matter
Setting retention override for a matter
Moving or copying files or folders between matters
Creating, renaming, cloning or deleting tables
Updating table settings
Adding, editing, deleting or reordering rows
Changing any cell data
Adding, renaming, deleting or reordering columns
Editing column options
Creating, updating, or deleting forms
Changing form fields or settings