After upgrading to Sametime V12.0.2, we cannot send chats to offline users anymore using client or mobile app. After opening a case, HCL told us that there should be a policy for that. But this policy doesn't exists in ../sametime-config/policy/policies.user.xml.
This is a companion discussion topic for the original entry at https://www.angioni.nl/2024/05/04/after-upgrading-sametime-to-v12-0-2-you-cannot-send-messages-to-offline-users/