Core Engine Release 5.2

February 2026

We upgraded! What's new? Learn more about new features, technical changes and solved bugs in 4App Core Engine.

Note on upgrading: If you skip a version when upgrading, check all release and patch notes in between for important information. They apply cumulative.
Note on individualization: If your 4ALLPORTAL is highly customized or if you installed individual apps, please contact your implementation partner before upgrading. We recommend checking your custom contents, especially layouts and object renderers, carefully after an upgrade.

New Features and Improvements

Support for Microsoft Office 365 SMTP OAuth2

The Mail Connector now supports modern authentication via OAuth2 (XOAUTH2) specifically for Microsoft Office 365.
Further information: Office 365 mail configuration

Solved Bugs

• Fix the not showing tooltips on field labels
• Fix occasional language reverting to the previous value after changing it in personal user settings and reopening the application
• Fix incorrect image size in metadata caused by prioritizing EXIF tags (e.g., ExifImageWidth over ImageWidth)

Patch releases

Version 5.2.1

• Add legal information to the welcome screen

Version 5.2.2

• Fix missing connection with Comet when Welcome fails