Authentication Error in Email Clients

Incident Report for ionos.co.uk

Update

We have successfully minimised the disruption and are working to completely resolve it as soon as possible.

Posted Jun 10, 2026 - 16:26 BST

Identified

Due to technical disruption in our email systems, some customers may encounter authentication error in Microsoft Exchange Outlook. In the meantime, we recommend customers to use the OWA on https://exchange2019.ionos.co.uk/owa.

Posted Jun 10, 2026 - 11:59 BST

This incident affects: Email (Microsoft Exchange).