You can make a matter inactive to archive it.
Make a Matter Inactive
To make a matter inactive:
- From the left navigation panel, click Matters.
- On the Matters screen, single-click the matter, and then from the toolbar, click Edit.
- At the bottom of the Matter’s left navigation, click Settings.
- From the tabs atop the Settings section, click Matter Info.
- At the bottom of the Matter Info screen, uncheck the Active checkbox.
- In the upper right corner, click Save.