When installing an MUI Update Rollup for an enabled language, you might realize that the MUI version wont be updated immediately.
You can see this in UI beneath Settings, Administration, Languages or in SQL table OrganizationLanguagePack (database MSCRM_CONFIG).
Note: MUI patches are not applied to the database immediately upon install. The patch install will drop the updated files, but the database won't be updated until a certain async job has been started.
This job runs on a fixed schedule (once a day).
In order to check the NextRunTime of this job, you might open SQL table ScaleGroupOrganizationMaintenanceJobs in database MSCRM_CONFIG and look for OperationType = 42
If this jobs detects that the MUI version was updated (by version mismatch in registry HKLM\Software\Microsoft\MSCRM\LangPacks and database MSCRM Datenbank, Tabelle OrganizationLanguagePack), it will re-provision the language and also update the version of OrganizationLanguagePack in the database.
You have also the option to re-provision the language pack manually. In order to do this, you need to disable and enable the language pack in UI beneath Settings, Administration, Languages. But please be aware that users will loose their personal language settings in this case. It will fall back to base language.
Dynamics CRM Team