Settings for POP and IMAP access for Microsoft 365 operated by 21Vianet

Applies To
Microsoft Outlook Web App for Office 365 operated by 21Vianet - Small Business Outlook.com Outlook Web App for Office 365 operated by 21Vianet

Note

This article applies to Microsoft 365 operated by 21Vianet in China. All other customers should seePOP and IMAP settings for Outlook Microsoft 365 for business⁠.⁠

Exchange Online supports mailbox access through the IMAP4 or POP3 protocol. The SMTP protocol is used to send outbound mail for clients that connect to Exchange Online through IMAP or POP. To configure for POP and IMAP access, use these settings:

Server name Port Encryption method
POP3 partner.outlook.cn 995 SSL
IMAP4 partner.outlook.cn 993 SSL
SMTP smtp.partner.outlook.cn 587 TLS