Microsoft Email: Linux Evolution-EWS Email Client Configuration


The Linux Evolution-EWS email client no longer works with Microsoft 365 modern authentication via OAuth2.0 support. Check out the latest information below.

Microsoft has announced that the Outlook REST API v2.0  endpoints will be decommissioned in March 2024. Initially, it appeared that this change would not affect the UTK tenant. Unfortunately, further investigation has revealed that it will likely break the Evolution email client, commonly used by Linux users.


Previously, we configured an OAuth2 workaround using a registered app that leveraged the REST API. However, Microsoft is now taking action against these “workaround” authentication methods. The REST API and EWS (Exchange Web Services) fall into this category, as they rely on a registered app as the delivery method.


To ensure a smooth transition and continued access to your email services, we recommend the following options:

  1. Switch to Thunderbird: Thunderbird is an email client that fully supports OAuth2. Thunderbird allows you to seamlessly connect to your Outlook account without disruptions. Instructions are available in the KB: Email: Setup UTK Microsoft 365 or Gmail Account in Thunderbird
  2. Consider Outlook Web Access (OWA): If you prefer a supported product directly from Microsoft, consider using Outlook Web Access (OWA). OWA provides a web-based interface for accessing emails, calendars, and contacts.


Article ID: 122272
Tue 12/8/20 12:39 PM
Thu 3/21/24 11:26 AM
Microsoft 365