Tag Archives: Exchange Online

Exchange Web Services update

Exchange Web Services (EWS) is a legacy Microsoft API that allows software applications to access and interact with Exchange mailboxes—things like email, calendar, contacts, and folder data. In September 2023 Microsoft announced that EWS would be disabled in Exchange Online in October 2026, advising developers to move to Microsoft Graph. As part of the retirement journey EWS access will be blocked for all mailboxes without rights to EWS from 1 July, 2026. This sounds a bit bizarre, but although Exchange Online Kiosk, Microsoft 365 F3, and Office 365 F3 licenses don’t include EWS rights, restrictions have never been enforced. Note that this date was recently moved from 1 March, 2026 to give customers extra time to remove their dependencies on EWS.

Find the updated announcement article here: https://bit.ly/4jJHitX.

Auto-Archiving for Exchange Online

There’s a new feature in Exchange Online that automatically archives the oldest items in your mailbox after it reaches 96% of its quota. This goes hand in hand with the current time-based archiving and avoids any email disruption that could be caused by hitting mailbox limits due to big attachments or large volumes of AI-generated content. Exchange Online Plan 1 and Plan 2 will continue to offer a 50 GB and 100 GB archive mailbox respectively. This feature is currently in private preview for selected customers, will be in public preview from 15 November, 2025, and generally available in January 2026.

There are some useful FAQs and details of the announcement here: https://bit.ly/43nKeFC.

Exchange Online Tenant External Recipient Rate Limit (TERRL)

Microsoft introduce a new tenant-level outbound email limit based on the number of email licences that a tenant has. There’s a table showing sample limits with various licence counts, or you can work it out yourself using the provided formula – have you ever calculated anything to the power of 0.7? Now’s your chance!

Enforcement starts from 3 April, 2025 and you can find all the pertinent details with a useful FAQ in the lengthy announcement article here: https://bit.ly/4ijbhYm.

Concurrent Exchange Online licence assignments

Microsoft introduce support for concurrent Exchange Online licence assignments, which means that users can now be assigned multiple licences that include access to Exchange Online. This article (http://bit.ly/3XNIpg6) gives you an overview of how it all works and the benefits of stacking licences in this way.

Microsoft Teams Trial in CSP.

Microsoft Teams

Microsoft announce at Inspire that they’re launching a trial of Teams in CSP from 1st August, 2019. It’s aimed at customers who have yet to see the value of the cloud, or who are perhaps using a standalone service such as Exchange Online.

Watch the 20-minute session that covers this new offer here: http://bit.ly/2Z9s0o6, with this particular slide at 13:13.

Exchange Online Advanced Threat Protection

Microsoft announce Exchange Online Advanced Threat Protection – a new email filtering service that adds on to the protection provided by Exchange Online Protection to protect against specific types of advanced threats.

It will be available in the summer and be licensed with a User SL priced at $2 per month. This very readable Microsoft announcement article is worth a look for some detail on the precise services it will offer and an FAQ: http://bit.ly/1FkYkb6.