Editing Category:CRPF (section)

==Training on CRPF Session 1. Dated 02 NOV 2024 - Tetra Support Staff - TAKSHAY==

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'''Video summary:''' KT session (Part 1) on CRPF's mail environment, migrated from Lotus Notes to Zimbra and split across two parallel deployments: a Network Edition environment (~5000 users) and an Open Source environment (~10000 users), each with its own pair of MTA, LDAP, and mailbox servers plus an HA pair in front. To hide this split from end users, a single-URL login server (Python/Flask, itself HA'd via a shared virtual IP between two identical instances) looks up which environment a given user belongs to via a text file that's regenerated from both environments' user lists every 5 minutes by cron -- meaning a newly-created account needs up to a 5-minute wait before it can log in through the unified URL. Also covers CRPF's specific requirement around their 429 physical offices: accounts are provisioned with an office-suffixed internal domain and restricted so a user can only mail within their own office's user group, while an email alias masks that internal office-specific address so the outside-facing address a correspondent sees never reveals which office the user belongs to.