Contacts | EWS | Office 365
Moving Public Folder Contacts to a Shared Mailbox Before EWS Goes Away
If your team keeps a company contact list in an Exchange Online (Microsoft 365) public folder, the clock is running. Starting October 1st, 2026, Microsoft begins switching EWS off in Exchange Online, tenant by tenant, and on April 1st, 2027, it is fully and permanently disabled, with the tenant-level switch removed. That matters for public…