SERVICE FEATURES

Mailbox size

Configurable

500 MB for Exchange Online Kiosk user, 25 GB for Exchange Online Plan 1 user, unlimited for Exchange Online Plan 2 user

Message size limits (max attachment size)

Configurable

25 MB

Recipient limits

Configurable

10 000 recipients/day

Message rate limits

Configurable

30 messages/minute

Deleted item recovery

Configurable

14 Days

Deleted mailbox recovery

Configurable

30 Days

CLIENT ACCESS

Outlook 2010

Yes

Yes

Outlook 2007

Yes

Yes

Outlook 2003

Yes

No

Outlook Anywhere (RPC over HTTPS)

Yes

Yes

Outlook Cached Mode

Yes

Yes

Outlook Online Mode

Yes

Yes (not recommended)

Autodiscover

Yes (for Outlook and mobile)

Yes (for Outlook and mobile)

Outlook Web App

Internet Explorer 7+, Safari 3+, Firefox, Chrome

Internet Explorer 7+, Safari 3+, Firefox, Chrome

Outlook Web App light experience

Almost any browser

Almost any browser

Outlook Web App: Vanity URL (http://mail.contoso.com)

Yes

Customer can set up a redirect

Public/private computer logon option

Yes

No

Outlook Web App: session time-out

Configurable

Default: 6 hours
Configurable up to 24 hours.

WebReady document viewing

Yes

Yes

Disable web access

Yes

Yes

Instant messaging and presence connected to web email client

Yes

Yes

Macintosh support (rich client)

Outlook for Mac 2011, Entourage 2008 Web Services Edition

Outlook for Mac 2011,
Entourage 2008 Web Services Edition

IMAP

Yes

Yes

POP

Yes

Yes

MOBILITY

Windows Phone 7 devices

Yes

Yes

Windows Mobile devices

Windows Mobile 5.0+

Windows Mobile 6.0+

Other Exchange ActiveSync devices (such as iPhone)

Yes

Yes

Remote device wipe (implementation varies by mobile device manufacturer)

Yes

Yes

Customize Exchange ActiveSync security policies and settings, including PIN/password lock

Yes

Yes

Disable Exchange ActiveSync access

Yes

Yes

Mobile device allow/block/quarantine

Yes

Yes

Certificate-based authentication for Exchange ActiveSync

Yes

No

Over-the-air-update for Outlook Mobile

Yes

Yes

Mobile SMS sync (through Exchange ActiveSync)

Yes

Yes

SMS (text messaging) notifications

Yes

Yes

BlackBerry (via Blackberry Enterprise Server)

Yes

Coming later this year

BlackBerry (via Blackberry Internet Service)

Yes

Yes

EMAIL/INBOX

“Send on behalf of” and “send as”

Yes

Yes

Shared mailboxes

Yes

Yes

Catch-all mailbox

Yes

No

Server-side email forwarding

Yes

Yes

Inbox rules

Yes

Yes

Tasks

Yes

Yes

Conversation view and actions (such as ignore conversation)

Yes

Yes

MailTips and MailTips customization

Yes

Yes

Connected accounts (aggregate mail from multiple external email accounts)

No

Yes

CONTACTS/DIRECTORY

Personal contacts

Yes

Yes

Personal distribution groups

Yes

Yes

Shared distribution groups
(in Global Address List)

Yes

Yes—managed via web or synchronized from Active Directory

Restricted distribution groups

Yes

Yes

Dynamic distribution groups

Yes

Yes

Moderated distribution groups

Yes

Yes

Self-service distribution groups

Yes

Yes (for groups not synchronized from on-premises Active Directory)

Global Address List

Yes

Yes

Hide users from Global Address List

Yes

Yes

Custom address lists

Yes

No

Hierarchical address lists

Yes

No

Global Address List segmentation

Yes

No

Offline Address Book

Yes

Yes

External contacts (in Global Address List)

Yes

Yes

CALENDAR

Out-of-office auto-replies

Yes

Yes

Cross-premises calendar free/busy (mix of on-premises/cloud users)

Not applicable

Yes

Federated calendar sharing

Yes

Yes

Publish or subscribe to calendar thorugh iCal

Yes

Yes

Side-by-side calendar view in web client

Yes

Yes

Resource mailboxes (for example, for conference rooms or equipment)

Yes

Yes

Outlook 2010 Room Finder

Yes

Yes

UNIFIED MESSAGING, FAX

Interoperability with on-premises voicemail systems

Yes

Via SMTP or Exchange Web Services

Exchange Unified Messaging (hosted voicemail)

Yes

Yes

SECURITY

Anti-spam (AS)

Customer chooses AV/AS solution

Forefront Online Protection for Exchange

Antivirus (AV)

Customer chooses AV/AS solution

Forefront Protection for Exchange

Safe and blocked senders (configurable at the organization level)

Yes

Yes

Opportunistic TLS for inbound/outbound email

Yes

Yes

Forced TLS for inbound/outbound email

Yes

Yes

S/MIME

Yes

Yes, with limitations

No Outlook Web App support

PGP

Yes

Yes

COMPLIANCE/ARCHIVING

Disclaimers

Yes

Yes

Transport rules

Yes

Yes

Personal archive

Yes

Yes

Retention policies

Yes

Yes: Exchange 2010 retention policies
No: Exchange 2007-style managed folders

Journal messages to external or on-premises archive

Yes

Yes

Multi-mailbox search (e-discovery)

Yes

Yes

Legal hold

Yes

Yes

Rolling legal hold (single item recovery)

Yes

Yes

ADMINISTRATION

Administration through a Web-based interface (Exchange Control Panel)

Yes

Yes

Forefront Online Protection for Exchange Administration Center access

Optional

Yes

Administration through command line shell (PowerShell)

Yes

Yes

Role-Based Access Controls (RBAC)

Yes

Yes

Message tracking

Yes

Yes

Usage reporting

Some data can be extracted using PowerShell

Some data can be extracted using PowerShell

Auditing

Yes

Yes

APPLICATION ACCESS/CUSTOMIZATION

Application connectivity through web services

Yes

Yes

SMTP relay

Yes

Yes

Outlook Web App Web Parts

Yes

Yes

Outlook add-ins and Outlook MAPI

Yes

Yes

Application connectivity through Exchange Server MAPI/CDO API

Yes

No

Application connectivity through DAV

No

No

OTHER

Public folders

Yes

No

Global Address List synchronization from on-premises directory (Active Directory)

Not applicable

Yes—one-way through the Directory Synchronization tool

Global Address List synchronization from multiple on-premises Active Directory forests

Yes

No