# Migrating DESY’s Collaboration Platform from Mattermost to Nextcloud Talk

- Institution: CERN
- Speaker: Ingo Ebel
- Year: 2026
- Language: English
- Subjects: Computer science
- Source: [CERN](https://videos.cern.ch/record/3025421)
- Licence: [CERN](https://copyright.web.cern)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

DESY is transitioning its long-running Mattermost service to Nextcloud Talk to create a more integrated, secure, and user-friendly communication environment. This migration strengthens alignment with DESY's digital sovereignty strategy and unifies messaging, file sharing, and collaborative editing within a single platform.

The presentation highlights key technical and organizational aspects of the move: architecture and scaling, federation, compliance and integration with existing DESY infrastructure. We share lessons learned from pilots, operational evaluations, and user feedback, offering practical insights for research institutions modernizing their real-time communication services.

00:00:00 Slide 1

00:00:10 Slide 2

00:00:50 Slide 3

00:01:26 Slide 4

00:02:37 Slide 5

00:04:03 Slide 6

00:05:46 Slide 7

00:06:19 Slide 8

## Lectures

1. [Migrating DESY’s Collaboration Platform from Mattermost to Nextcloud Talk](https://invisiblenetwork.ai/learn/cern/3025421/ee5aa0832b55), 7 min (CERN's player)