About the customer
The customer is a mid-sized company with several sites in southern Germany. Its staff are mainly office administrators and technicians working mobile across different locations.
Starting situation
The customer wanted a comprehensive full-service IT partner and managed service provider that not only delivers classic IT services but also acts in an advisory and coordinating role – for example when liaising with other service providers (electricians, media agencies, Telekom, Vodafone, etc.).
The entire IT and telephony infrastructure was to be supported and managed. Continuous updating and assurance of the availability and security of all systems was required.
The customer’s requirements
Kommunikation & Mail
Mail server, document management, web servers and websites – fully supported and always up to date.
Network & security
Network and Wi-Fi, IT security (firewall, virus scanner, network segmentation), IP security cameras.
Mobile & Server
Mobile devices (MDM), backup and archiving, patch management and monitoring, servers.
Software systems
DATEV, SFIRM, time recording – fully supported, updated and optimised.
PROXYTEC’s solution and services
Mail server
Starting with a Tobit David mail server that initially handled only faxes and then remained in service for almost 20 years, this was replaced by Microsoft 365 in 2024. In the words of the managing director, the migration went „really well! Ran perfectly. Many thanks and a big compliment to you all.“
Network and Wi-Fi
Originally the network consisted of a single segment, which was divided into various VLANs through network segmentation: servers, DMZ, clients, telephony, backup, cameras, alarm system, Wi-Fi, guest Wi-Fi and management devices. The network has 10-gigabit links between the switches. Wi-Fi access points with 2.5-gigabit uplinks and ultra-range antennas provide maximum range. Satellite sites are connected via VPN.
IT security
A powerful hardware firewall with various security mechanisms is in use. In addition, a behaviour-based virus scanner is installed on every end device.
IP cameras & video surveillance
The main and satellite sites are covered by video surveillance. Cameras and recorders from TP-Link VIGI are used – reliable, cost-effective and regularly supplied with feature updates. An extension with AI-based video analysis is planned.
Mobile Device Management
The mobile technicians are equipped with notebooks and smartphones. All devices are configured uniformly through an MDM system. Apps can be installed and approved centrally; if a device is lost it can be located and reset to factory settings.
Backup and archiving
A data backup of the servers is created daily and checked for integrity at regular intervals. Every mailbox has audit-proof archiving. The management’s notebooks are additionally backed up in the cloud.
Server
At the outset there was only a single Windows server system, which grew into a VMware hypervisor with around 15 VMs. At the end of 2025 the system was moved to Proxmox and migrated within one weekend – primarily because of the sharp rise in VMware licence costs.
Document management
As the company processes many incoming and outgoing documents, a document management system was introduced. The system recognises, archives and processes documents automatically.
Conclusion
This customer is a prime example of a long-standing, trusting and extremely satisfied partnership. With extensive, demanding requirements and a highly complex yet exemplarily structured system environment, it demonstrates impressively how well our managed services support, relieve and future-proof those requirements in full.