Editing Training 2022 Linux team/ (section)

==Training session Tetra team on Infosys ITD zimbra understanding. Dated 11 Nov 2022 - Tetra Support Staff - Biswajit Banerjee==

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'''Video summary:''' [PARTIAL TRANSCRIPT QUALITY - patchy but core content legible] "Training session Tetra team on Infosys ITD zimbra understanding" -- continues directly from the DOP/Amanda session, now covering the Income Tax Department (ITD) side of the Infosys engagement, which runs Zimbra rather than Amanda. Recaps the two Infosys sub-projects side by side (DOP on Amanda backup; ITD on Zimbra) before walking the ITD Zimbra architecture: a DC (data center) with Zimbra 8.8.15 components and a separate DR (disaster recovery) environment that is currently NOT properly replicating -- root-caused to someone having disabled DR-DC replication entirely by mistake, so it isn't functioning until re-enabled/fixed. Notes the architecture as documented is missing a piece around HA/clustering that needs to be reconciled with what's actually deployed, and references comparable documented architectures (e.g. GSTN) as a pattern to check against. Reviews some account details shared with the team (admin/mailbox counts, credentials) and works through an architecture diagram live. Closes with the presenter redirecting a trainee's tangential question about Docker/microservices back on topic, reiterating this session is specifically about understanding this customer's existing multi-server architecture, not a general technology discussion.