Service description (Exchange Online) — Microsoft 365 Business

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• Hosted messaging Report an error

  “Microsoft Exchange Online is a hosted messaging solution that delivers email, calendar, contacts, and tasks from PCs, the web, and mobile devices.”

• Entra integration Report an error

  “It integrates fully with Microsoft Entra ID, enabling administrators to use group policies, as well as other administration tools, to manage Exchange Online features across their environment.”

• Multitenant datacenters Report an error

  “With the Exchange Online hosted plans described in this document, email is hosted on servers that support multiple customers simultaneously. These servers are housed in Microsoft datacenters”

• Subscription required per user Report an error

  “Each user who accesses the Exchange Online service must be assigned to a subscription plan, and each user subscription has its own mailbox.”

• Shared mailboxes no subscription Report an error

  “User subscriptions are not required for conference rooms and shared mailboxes. These special mailbox types do not have login credentials, instead, licensed users with the appropriate permissions manage and access them via delegation.”

• F1 no mailbox Report an error

  “Microsoft 365 F1 does not include rights to an Exchange mailbox.”

• Plans listed Report an error

  “These features are available for all Business (basic, standard, and premium), Enterprise (E1, E3, E5 and F3) and Exchange Online plans (1, 2 and Kiosk)”

• Antispam antimalware all plans Report an error

  “Anti-spam and anti-malware protection (via direct access to the Exchange admin center management interface) Built-in anti-spam and anti-malware protection (uses multiple anti-malware engines to scan inbound, outbound, and internal messages for malware)”

• Quarantine all plans Report an error

  “Quarantine - administrator management, and quarantine - end-user self-management”

• Administration tools Report an error

  “Microsoft 365 portal and admin center access, Exchange admin center access, Remote Windows PowerShell access”

• Activesync policies Report an error

  “ActiveSync policies for mobile devices”

• Mailbox replication ha Report an error

  “High availability and business continuity Mailbox replication at datacenters”

• Single item recovery exclusions Report an error

  “Single item recovery (not available for F3 and Kiosk plans)”

• Deleted mailbox recovery Report an error

  “Deleted mailbox and deleted item recovery”

• Interoperability Report an error

  “Skype for Business presence in OWA and Outlook SharePoint interoperability EWS connectivity support, SMTP relay support”

• Mail flow features Report an error

  “Custom routing of outbound mail Secure messaging with a trusted partner, Adding a partner to an inbound safe list Conditional mail and hybrid email routing (CALs or upgrade to an Enterprise SKU provide the access rights)”

• Hybrid deployment Report an error

  “Hybrid deployment supported (CALs or upgrade to an Enterprise SKU provide access rights for business and F3 plans), IMAP, cutover, and staged migration supported”

• Recipient features Report an error

  “Capacity alerts, Clutter, MailTips Inbox rules, Resource mailboxes, Out-of-office replies Offline address book, Address book policies Distribution Groups, External contacts (global), Universal contact card, Contact linking with social networks”

• Conference room management Report an error

  “Conference room management, Calendar sharing (Kiosk calendars can only be accessed or shared through OWA)”

• Federated sharing Report an error

  “Federated sharing (including calendar publishing)”

• Site mailboxes Report an error

  “Site mailboxes (SharePoint Online must be included and deployed)”

• Public folders exclusions Report an error

  “Public folders (not available for F3 and Kiosk plans)”

• Voice message services Report an error

  “Voice message services Skype for Business integration Third-party voice mail interoperability (only E3/E5 and Plan 2 provide voicemail and third-party voicemail/fax integration”

• Ews deprecation Report an error

  “"Exchange Web Services (EWS) in Exchange Online is deprecated and scheduled for retirement. Phased disablement begins October 1, 2026, with permanent retirement on April 1, 2027. Customers should plan to migrate EWS-based applications to Microsoft Graph.”

• Outlook mobile screen limit Report an error

  “10 Commercial users with the following subscriptions are allowed to use the Outlook mobile app on devices with integrated screens 10.1" diagonally or less: Office 365 Enterprise E1, Office 365 F1, Office 365 A1, Microsoft 365 Business Basic, and if you only have an Exchange Online license (without Office).”

• Message center Report an error

  “Messaging: To stay informed of upcoming changes, including new and changed features, planned maintenance, or other important announcements, visit the Message Center.”

• System requirements reference Report an error

  “System requirements for Exchange Online: For system requirements, the monthly subscription-based service available for business, education, and government organizations, see Microsoft 365 and Office Resources.”

• Limits reference Report an error

  “Storage and recipient limits for Exchange Online: For information about the storage and recipient limits available in the Exchange Online subscription plans, see Exchange Online limits.”

• Education storage limits Report an error

  “Storage allocations in Education tenants may be limited. Please see Office 365 Education service description for details.”

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