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The following tables detail the supported and unsupported elements for Exchange Online Migration/Exchange On-Premises Migration.
NOTE
Starting March 1, 2026, Microsoft will start to block Exchange Web Services (EWS) access for mailboxes with licenses that do not include EWS rights. The impacted licenses are Exchange Online Kiosk, Microsoft 365 andOffice 365 F1, and Microsoft 365 and Office 365 F3. If you are assigned these licenses only, migration will also be blocked. For details, refer to Update to EWS Access for Kiosk / Frontline Worker Licensed Users and Exchange Online service description.
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