open-xchange

The Open-Xchange tag on WindowsForum.com covers discussions about the open-source collaboration suite, particularly its use in large-scale migrations away from proprietary platforms. Recent threads highlight the German state of Schleswig-Holstein's migration of over 40,000 mailboxes from Microsoft Exchange to Open-Xchange, paired with Mozilla Thunderbird as the client. This move is part of a broader government strategy to achieve digital sovereignty by replacing Microsoft software with open-source alternatives. Topics include the technical challenges of migrating email and calendar items, the role of Open-Xchange in public-sector IT, and the implications for enterprise collaboration. The tag is relevant for IT professionals and decision-makers evaluating open-source groupware solutions.