Knowledge Base · Page 5

Practical enterprise IT articles built around real failure symptoms and safe troubleshooting order.

The knowledge base covers common enterprise issues involving Active Directory, Windows Server, networking, virtualisation, databases, backup and storage, with practical guidance for production environments.

Active Directory / GPOFile permissionsNetwork / VPNVDIBackup / NASServers / legacy systems

Common troubleshooting topics

  • gpupdate succeeds but the GPO is absent
  • Repeated domain-account lockouts
  • Shares fail by hostname
  • Slow internet after VPN connection
  • The port is open but the application fails

Topics include identity and access, connectivity, server platforms, virtual desktops, data protection and legacy-system operations, allowing teams to locate guidance by incident scenario.

Articles

Enterprise IT technical articles: networks, servers, AD, VMware, backup and operations · 5

Practical infrastructure topics for managed IT: networks, Windows Server, AD/GPO, VMware, VPN/SD-WAN, firewalls, Veeam, NAS permissions, factory network upgrades and legacy migrations.

Backup, NAS and business continuityTechnical article

Veeam reports a successful backup: why might recovery still fail?

Job success does not equal recoverability. Validate restore points, application consistency, repository health, encryption credentials, boot dependencies, and isolated recovery…

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Network, VPN and firewallTechnical article

VPN connects successfully but internal servers are unreachable: should you check routing, DNS, or the firewall first?

Troubleshoot a connected-but-unusable VPN in order: address assignment, routes, internal DNS, access control, server firewall, NAT, and the return path.

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Windows Server and file permissionsTechnical article

How can staff edit files in a shared folder without being allowed to delete other users’ files?

The Modify right includes deletion. Limiting deletion while allowing edits requires a design using Creator Owner, ownership, delete-child rights, working folders, versioning, and…

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Network, VPN and firewallTechnical article

VPN is connected but a file share will not open: DNS, SMB, credentials, or permissions?

File-share access over VPN depends on name resolution, DNS suffixes, SMB connectivity, cached credentials, domain authentication, share permissions, and NTFS ACLs.

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Windows Server and file permissionsTechnical article

How to clean up a file share by replacing per-user permissions with security-group access

Export the current ACLs and business requirements, create read-only and read-write groups, resolve inheritance and exceptions, migrate in stages, and retain rollback data.

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Windows Server and file permissionsTechnical article

How to revoke shared-file access, preserve data, and complete an employee offboarding handover

A controlled offboarding process must cover the account, group membership, file and NAS access, VPN, business systems, file ownership, mail, and documented handover.

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Active Directory and Group PolicyTechnical article

Slow domain sign-in: how to troubleshoot DNS, logon scripts, mapped drives, printers, and profiles

Compare local and domain sign-in, network location, event timing, and policy results to identify the dependency causing the delay.

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Active Directory and Group PolicyTechnical article

A shared printer installs manually but Group Policy deployment fails: what should you check?

Check printer security, share permissions, driver compatibility, Point and Print restrictions, user versus computer policy, and the target OU.

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VMware Horizon and VDITechnical article

Slow VMware Horizon sign-in: Active Directory, DNS, network, Connection Server, or the desktop agent?

Measure authentication, desktop assignment, agent connection, user-profile processing, and display-protocol establishment separately.

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VMware Horizon and VDITechnical article

A VDI data-drive root can create folders but not files: how to repair the ACL consistently

Review advanced root permissions, OI/CI inheritance, user SIDs, persistent disks, and the master image, then repair through a pilot and controlled script or GPO rollout.

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SQL Server, ERP and legacy systemsTechnical article

What to assess before migrating an ageing Windows Server, and how to preserve rollback

Complete dependency inventory, compatibility testing, verified backups, parallel operation, cutover planning, rollback criteria, and business acceptance before migration.

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SQL Server, ERP and legacy systemsTechnical article

SQL Server transaction log is too large: how to assess recovery model, log backups, and shrink risk

Identify the log-reuse wait and recovery objective first, then correct log backups or long transactions. Shrink should be a controlled exception, not routine maintenance.

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SQL Server, ERP and legacy systemsTechnical article

The SQL Server port is reachable but the ERP client will not open: what should you test next?

Port reachability proves only the network layer. Continue with instance resolution, drivers, TLS, database state, application services, licensing, and client configuration.

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Backup, NAS and business continuityTechnical article

Does a NAS with snapshots still need an independent backup, and why are snapshots not backups?

Snapshots provide fast rollback but depend on the source appliance. Combine them with independent replication, offline or immutable copies, and regular recovery tests.

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Backup, NAS and business continuityTechnical article

Is TrueNAS suitable for enterprise file sharing, and how should SMB, ACLs, AD integration, and backup be designed?

TrueNAS can serve enterprise file shares when ZFS, SMB, ACLs, security groups, snapshots, independent backup, and cross-platform behaviour are designed deliberately.

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