Home > How to update the Core Atlas file for May 2025 HU Compatibility

How to update the Core Atlas file for May 2025 HU Compatibility

This article applies to the following products:

  • Messageware OWA Suite 2019
  • Messageware OWA Suite 2016
  • Messageware AttachView
  • Messageware NavGuard
  • Messageware Plus Pack
  • Messageware TImeGuard

Summary

A new version of Messageware OWA Suite is available from Messageware that is compatible with the following May 2025 HU updates that Microsoft has released:

  • Exchange2016-CU23-KB5057653

  • Exchange2019-CU14-KB5057652

  • Exchange2019-CU15-KB5057651

Applying the HU without the compatible version of Messageware will cause OWA availability issues.

A temporary workaround to doing a full Messageware upgrade is to apply the compatibility part of the Messageware update.  This can be applied without a service restart, and should take effect within a few minutes.

Steps

For Exchange Server 2019, download the following file:

https://m3.messageware.com/download/support/May_2025_HUs/Core.Atlas_2019.xml

For Exchange Server 2016, download the following file:

https://m3.messageware.com/download/support/May_2025_HUs/Core.Atlas_2016.xml

Navigate to the MAC (Messageware Admin Console) to the Deployment page.

Select the server on the left-hand side, and click on ‘Update’ button in the ‘Messageware Common Framework 2019/2016’ section, next to the Atlas version number.

Select the file that was downloaded above matching the Exchange major version of the server.

The new Atlas file will correct the compatibility issue within a few minutes without requiring a service restart.

Repeat for each server in the list.