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Technical guides from real engineering practice: installation, integration, automation, troubleshooting and production operation of modern Linux and open-source platforms. The articles connect concrete configuration with architecture, security, lifecycle, monitoring and operations.

  • grommunio Web shows the target mailbox after single mailbox restore with two test mails.
    grommunio & Groupware

    grommunio disaster recovery and single mailbox restore

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    4 minutes read

    Part 11 of the grommunio 2026 series validates full DR and targeted mailbox restore in a real appliance lab.

    : grommunio disaster recovery and single mailbox restore
  • grommunio Web ist vor dem Failover über die hs1-VIP erreichbar.
    grommunio & Groupware

    grommunio 2026 Cluster and High Availability: from multi-server lab to tested active/standby homeserver

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    17 minutes read

    Part 10 shows grommunio HA with DRBD, Pacemaker, Corosync, STONITH, witness, VIP and an active/standby homeserver.

    : grommunio 2026 Cluster and High Availability: from multi-server lab to tested active/standby homeserver
  • grommunio Admin zeigt mehrere Organizations als zentrale Mandantenstruktur.
    grommunio & Groupware

    grommunio Multitenancy 2026: organizations, domains and multiple LDAP sources

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    9 minutes read

    Part 9 of the grommunio 2026 series classifies multitenancy realistically: organizations, domains, per-organization LDAP, admin boundaries, mail flow, GAL, calendar, MDM and MSP limits.

    : grommunio Multitenancy 2026: organizations, domains and multiple LDAP sources
  • grommunio Web shows the registered ActiveSync device under Mobile Devices.
    grommunio & Groupware

    grommunio MDM 2026 step by step: manage ActiveSync devices safely

    Author:
    ForgeOneStamenography 17.
    Mathias Rumbold
    8 minutes read

    Practical guide for grommunio Mobile Device Management with Exchange ActiveSync, grommunio Sync, device overview, resync, remove and remote-wipe safety.

    : grommunio MDM 2026 step by step: manage ActiveSync devices safely