This policy setting sets the apps for Office catalog refresh period, which is the amount of time (hours) Office waits between refreshes of the app catalogs. Refreshing the catalogs detects whether entitlements to any apps have expired.
If you enable this policy setting, set the number of hours to determine the length of the refresh period. Choose a value between 0 (always refresh) and 10,000.
If you disable or do not configure this policy setting, the catalog refresh period is set to the default 72 hours.