For libraries using the Koha OPAC integration for OverDrive, the Koha system preference OverDrivePasswordRequired should be changed to "Required."
If the integration is set up through Aspen, the relevant setting can be found in Aspen Administration -> OverDrive -> Settings. From there, the Authentication and Advantage Information box has a column labeled "Is a Pin Required to log into Overdrive website?" The setting can be updated if not; historically, libraries were encouraged to match this setting to their Overdrive website login settings, so many libraries will need to update this configuration with the new PIN/password requirement.
ByWater partner libraries using Aspen with another ILS need to check in with their vendor to ensure their ILS SIP connection is compliant with the new policy as well.
Once these changes are in place, libraries should notify OverDrive that ILS settings have been updated to comply with new requirements.