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mediumExchangedeprecationm365_message_center · Oct 1, 2026
Microsoft Exchange Online: Exchange Web Services (EWS) enforcement update for EWSAllowedAppIDs
Starting October 10, 2026, EWS access will require more than just setting EWSEnabled=True for affected Exchange Online tenants, indicating a step towards deprecating EWS.
“Services: Exchange Online. <p><b>[What and why]</b></p><p>As previously communicated in <i>MC1466860</i> and <i>MC1447678</i>, Microsoft is continuing the retirement of Exchange Web Services (EWS) in Exchange Online.</p><p>Beginning October 10, 2026, setting EWSEnabled=True will no longer be sufficient to allow EWS a…”
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endpoint_securitycloud_security
Audience
admin
Environment
cloud
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