---
title: "On-Premises Search"
url: https://lookeen.com/use-cases/on-premises-search
lang: en
description: "Enterprise search in your own data center: Lookeen Server indexes file servers, Exchange, Microsoft 365 and PST archives – with Active Directory, single sign-on and permission-aware results."
published: 2026-10-12T10:00:00+00:00
modified: 2026-10-12T10:00:00+00:00
---

# On-Premises Search

Lookeen Server brings one central search across all of your organization's emails and documents into your own data center – connected to Active Directory and with exactly the permissions that already apply.

[Talk to us](https://lookeen.com/contact) [Lookeen Server](https://lookeen.com/server)

## How it works

One server indexes your sources and everyone finds what they are allowed to see.

### One index for every source

File servers and network drives, Exchange Server (including public folders), Exchange Online and Microsoft 365, and PST archives – in almost 100 file formats.

### Permission-aware results

Lookeen stores the actual access rights of every item and filters every search by them. Nobody finds more than they could already open – shared mailboxes included.

### Active Directory and single sign-on

Users and groups are regularly synced with Active Directory. Sign-in via NTLM/Kerberos; people who leave the organization also lose access to Lookeen.

### Search where you work

In the browser with no installation, with the Lookeen client, or right inside Outlook. Results open in the preview with search terms highlighted.

## Operation in your hands

Installation, access and rollout stay on your network and under your administration.

-   **A Windows service on your network:** MSI installation on Windows Server 2012 (64-bit) or later; index and configuration on your drives.
-   **Encrypted transport:** HTTPS through a web server such as IIS acting as a reverse proxy.
-   **Administrator role:** A dedicated admin interface for sources, users, delegations, OCR and AI.
-   **Central rollout:** The Lookeen client can be deployed via Group Policy – in Citrix, VMware and terminal server environments too.

## Good to know

What you need for installation and which topics go with it.

### System requirements

Windows Server 2012 (64-bit) or later, Active Directory, .NET 4.8. Recommended: 4 cores, 16 GB RAM, an SSD with about 60 GB per million indexed documents. Outlook add-in from Outlook 2016.

### Related use cases

[Digital sovereignty](https://lookeen.com/use-cases/digital-sovereignty) · [AI with local models](https://lookeen.com/use-cases/local-ai) · [Search Microsoft 365](https://lookeen.com/use-cases/microsoft-365)

[All use cases →](https://lookeen.com/use-cases)