IceWarp EPOS Server – Release Notes (Version 14.2.0.12)

IceWarp EPOS Server – Release Notes

Version 14.2.0.12 | February 2, 2026

This release focuses on stability, performance, and numerous improvements in core IceWarp Server services.
Several fixes address issues reported in production environments, including higher mail throughput and longer server uptime.

Administrator Impact Summary

New Features

• OUTLOOK SYNC - Added a new feature to enable the automatic sync from the context menu.

Improvements & Optimizations

• SERVER - Improved handling of calendar invitation replies.

• SERVER - Improved authorisation to Remote Console.

• WEBCLIENT - Improved deleting one occurrence instead of a whole recurrence in the conference module. 

Fixed Issues

Critical Fixes

• none

Other Fixes

• SERVER - Fixed an IMIP invitation that caused a bare LF.

• SERVER - Fixed function "Delete older mails than".

• SERVER - Fixed an issue with two-factor authentication via SMS, causing the receipt of two codes. 

• WEBCLIENT - Fixed an issue with marking emails as read in shared accounts' inbox. 

• WEBCLIENT - Fixed a bug causing the display of an empty DOCX file in the new task window.

• WEBCLIENT - Fixed issues with message classification in the email composing window. 

Security Updates

• Addressed a security issue related to cross-site scripting attacks in specific edge cases.

Severity: Medium
Administrator action: Update recommended

Breaking Changes & Deprecations

• As part of our long-term commitment to strengthening cybersecurity, the legacy option for accessing the API via the /rpc/ endpoint has been removed. We recommend using the modern API endpoints, which allow IceWarp to maintain a high level of security.

Upgrade Notes

• Downtime required: Yes (service restart required)

• Estimated downtime: Up to 15 minutes when upgrading from 14.2.X

• Backup recommendation: Full configuration and data backup before upgrade

• Rollback supported: No

Compatibility & Configuration Notes

• No changes to default configuration values.

• Fully compatible with existing LDAP and Active Directory integrations.

• No changes to supported browsers for WebClient.

Support & Feedback

If you experience any issues after upgrading, contact IceWarp Support and reference IceWarp Server 14.2.0.12.
Please include server version, operating system, database type and version and relevant logs when opening a support case.