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Domains & Hosting

Hosted Microsoft Exchange: Here's how it works

Professional communication solutions for a cohesive company

Microsoft Exchange is a popular email and groupware server solution used by companies of all sizes around the world. The software includes powerful collaboration features that help organizations optimize both internal and external collaboration and communication processes.

Microsoft Outlook is also available as client-side software, meaning employees always have full control over emails, appointments and contacts. With Exchange-based Outlook, colleagues can easily see whether you are in a meeting or on vacation — making light work of joint scheduling and project work.

MS Exchange logo

Hosted Exchange combines trusted Microsoft software with reliable email hosting

  • Your data is handled with the utmost care and protected in our ultra-modern ISO-certified data centers in the US
  • Thanks to our geo-redundant infrastructure, your company’s important data is optimally protected against failure and loss
  • Your data is stored in accordance with relevant data protection regulations

Achieve maximum productivity with maximum availability

  • No need to set up your own expensive in-house infrastructure
  • Monthly subscription means no upfront investments in hardware
  • The latest technology and security standards

Graphical display: Send and receive secure email

Technical features at a glance

Microsoft Preferred Architecture

Get optimal deployments with an Exchange platform that follows Preferred Architecture best practice recommendations.

Georedundant setup

Microsoft Preferred Architecture provides a highly available, fully georedundant setup within the data center. It also ensures site resilience between 2 redundant data centers and fast failover times.

Multiple domain controllers

Each data center deploys multiple domain controllers so that there are local and site redundancies in the event of server or site failure.

BGP routing

Client traffic is split using BGP routing between multiple load balancers within both data centers. This traffic is then load balanced onto Exchange Mailbox Servers with per-service health checks.

Professional administrative access

The active directory is configured and managed using a tiered administrative model that meets Microsoft Privileged Access best practices.

Exchange native data protection

IONOS uses Exchange native data protection architecture. This design deploys multiple copies of the mailbox database on multiple servers, providing you with high availability, fast failover time, and disaster recovery.

No single point of failure

Each mailbox database has 4 copies, 2 in each data center. All copies remain isolated, so there's never just one single point of failure.

High availability setup

Three databases run in an active-passive, high availability setup. One database remains active, while the 2 passive databases contain up-to-date copies which become active during fast failover.

Recovery mechanism

Get platform-level recovery. The 4th database is configured as a lagged copy, based on a rolling time point scheduled 7 days later.

No traditional backups needed

If the platform is used in combination with other Exchange features (which retain deleted items / mailboxes for specific time periods), traditional point-in-time backups are unnecessary.

High density storage servers

The platform is built using Dell R740XD2 high density storage servers using a design that has been vendor certified prior to purchase.

Tiered storage mechanism (MCDB)

A new tiered storage mechanism (MCDB) built into Exchange 2019 is used on the platform. It allows the combined use of SSD and HDD storage to improve the user experience, making login, search, and email access more user-friendly.

Faster searches and logins

Boost searches and logins by up to 50%. The hardware features a fast layer of tiered storage featuring multiple SSD architectures on each mailbox server.

Premier support from a Microsoft Gold Partner

You can expect a 1 hour response SLA for Severity A cases, and 24/7 critical situation support as needed.

Always up to date

All security patches are applied as soon as they are available.

24/7 platform monitoring

The operations team monitors the platform around the clock.

ISO-27001 certified

IONOS data centers, networks, and platforms are ISO-27001 certified for maximum reliability and protection.

Microsoft Exchange hosting for all your business email needs

Flexible: Add more mailboxes whenever you need them.
Add 5+ users and save on the second year!

Microsoft Exchange 2019

The world’s leading email and calendar solution


12 months $4/month then $8/month
Only $30/month Risk-free for 30 days
Only $50/month Risk-free for 30 days
1 user
12 months
 /month 
then /month
5 users
Just /month 
10 users
Just /month 

50 GB Exchange email account

Microsoft Outlook 2019 & Outlook on the web (OWA)

Real-time data sync on all devices

Team collaboration tools calendar, contacts and tasks

100 GB shared team folder

Premium virus protection and spam filter

24/7 expert support

Lifetime domain included Your domain is free for the lifetime of your Microsoft Exchange 2019 contract. There's no price increase on renewal. Included domain extensions: .us, .ca, .com, .net, .org, .info, .me, .biz, .online.

State and local taxes will apply. Click here for our General Terms and Conditions.

What are the added benefits and services that come with an IONOS Exchange Server?

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Worry-free administration of MS Exchange

There's no need for you to worry about administration because we manage it for you. While you and your colleagues take care of driving your business forward, we take care of server maintenance and updating. You also benefit from the latest in security technology — all important security updates are taken care of meaning your data is protected against loss or malfunction.

Your connection to the server is simple via Microsoft Outlook. This allows you to access your emails, contacts and appointments from all your devices via apps and the browser anytime, anywhere.

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Easy connection of future email accounts

You can easily connect both existing and new email accounts with the Hosted Exchange email server in just a few clicks. Since the IONOS Exchange solution is a flexible and easily scalable product, you can add more email accounts and mailboxes at any time. As your business grows, your hosted Microsoft Exchange environment grows with you.

All you need to do is purchase another license and add it to your existing account. This way, you can ensure in the long run that every new employee receives their own email address and an individual domain.

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First-class service backed by our experts

The Exchange technology is developed by Microsoft and is used worldwide — including in the IONOS data centers, which are operated and professionally maintained exclusively by us.

You benefit not only from the world’s most important groupware solution from Microsoft, but also from our leading server technology and the highest standards. All of our high-security data centers guarantee maximum reliability thanks to geo-redundant mirroring of all data at independent locations. And should you have any questions about the server or any difficulties, you can reach us around the clock!

Security and managed updates

With our Microsoft Exchange email hosting, you don’t have to worry about the security of your data. You can benefit from the following security features:

  • Security updates and patches
  • Automatic SSL/TLS encryption
  • Advanced anti-spam and antivirus technology

Accidentally deleted your inbox? We’ve got your back. The Email Recovery Service helps you recover your inbox up to seven days after being deleted.

Graphical display: Security for your email inbox

Easy email migration

Moving your emails from existing accounts to IONOS is free, fast and secure. Our email migration tool works with any provider, and even with emails hosted on your own server. In just a few steps, all folders and emails are copied across, so you can continue working seamlessly.

If you need support during configuration, your personal consultant will be glad to help. You can learn more about this service here.

Graphical display of how to migrate your email address to IONOS

Hosted Exchange 2019 & Outlook 2019 — new and improved

  • Improved security and overall performance
  • Streamlined configuration of Outlook once desktop client has been downloaded
  • Enhanced search function makes finding what you need easier
  • Simplified collaboration with updated calendar time zones and scheduling features
  • Upgraded out of office messaging
  • Integrated accessibility and text-to-speech features enable emails to be read to you

Two office workers arranging a meeting using an online calendar

Hosted Exchange and Outlook

Easy and efficient teamwork anytime and anywhere
Inbox & Address Book ManagementAppointment ManagementTask Management
RemindersNever miss an email or forget a contact: With our large 50 GB mailbox, you'll never miss emails. Set up reminders to deal with important emails later. All your business contacts are managed in one placeNever miss an appointment: Set up reminders with a variety of settings. Reminders are received on all devices.Never miss a deadline: Set up reminders for your tasks. Reminders are received on all devices. Tasks also visible in Calendar to simplify time management.
Efficient managementOrganize your emails by importance and topics. Rules help you manage the clutter. A search function also helps with navigating the inbox. The address book provides all the details about contacts at a glance.Organize your appointment in views such as Daily, Weekly, etc. In addition, a search function facilitates finding appointments.Organize your tasks in views such as Today, Next 7 days, Recurring, etc. Set up recurring tasks, with full flexibility of settings.
Collaboration made easyFolders are available to help organize your inbox and collaborate. Maintain and share distribution lists to facilitate communication.With calendar sharing, appointments can be organized in a team quickly and easily. Availability of colleagues can also be checked in advance.Share your tasks with your colleagues and partners. Request notifications and status messages for progress control.
Always up to dateEmails and contacts are automatically synchronized across all devicesCalendar entries and changes are automatically synchronized across all devicesTask entries and changes are automatically synchronized across all devices

Microsoft Exchange hosting

FAQ – Frequently asked questions

Technically speaking, Microsoft Exchange is a groupware server that powers email hosting and Microsoft's most popular productivity tool, scheduling assistant and email client, Outlook. Outlook is connected to Exchange, which works as a server application that is hosted on physical servers like those that reside in IONOS's proprietary data centers in the US and Europe.

In the past, email solutions were often configured and managed in-house, but at the cost of time, money and personnel. Nowadays, however, many companies have switched to external services such as Hosted Exchange with IONOS. There are many reasons for outsourcing or exiting the data center:

  • You stay flexible by scaling your Exchange resources when needed.
  • You save on the expensive maintenance of an in-house email server.
  • Your IT department has more time to concentrate on projects of higher importance.
  • You save the cost of tedious licensing.
  • You receive both the server infrastructure and, thanks to Microsoft Outlook, the software solution for remote working.

Yes — that will be possible in the future. We are currently working on providing our customers with the simplest possible migration functionality. However, the exact date of when this function will be available has yet to be determined. Check back with us for further updates.

If you are already a IONOS customer, you can contact your personal consultant at any time to receive comprehensive advice on migration and upgrade methods.

No, although the Hosted Exchange from IONOS is primarily aimed at companies, there are good reasons to rely on a professional and reputable email solution for home and personal use. Here's why:

  • You benefit from an email solution free from advertising.
  • With the Microsoft Outlook solution, you get a proven, clear and secure software product designed for emails and scheduling.
  • Thanks to the comprehensive spam filter, you are better protected against undesirable emails and dangerous phishing.
  • You gain full access to all Outlook features that also make your personal life easier: For example, when you're on vacation you can set up an out of office message or set reminders for important events in your calendar.
  • Thanks to countless apps and a separate browser version, you can synchronize your mailboxes and calendars across all your devices in an instant.

Yes! While the benefits of a mobile, flexible and scalable email solution for businesses are obvious, non-commercial use cases may initially seem less obvious. However, here are a couple of common scenarios:

  • Microsoft Exchange for education: University email can be easily sorted and managed with Outlook. This makes it easier for you to keep track of your correspondence. Due to Outlook's familiarity with educators, MS Exchange is also a great solution for schools and administrators too.
  • MS Exchange for personal use: Applying for a job is done almost exclusively online. A professional email solution makes it easier for you to keep track, and an individual email domain makes a more credible impression on potential employers. You can also read our Digital Guide article with tips on writing business email that leaves a lasting impression.
  • Microsoft Exchange for home use: Thanks to a synchronized calendar, families can record and share appointments or to-do lists from any device.
  • Exchange for non-profits: Hosted Exchange is also a great product for non-profits, charities, places of worship or other institutions. Exchange is fully scalable — you can add more users at any time — so as your organization grows, Exchange grows with you.

There's plenty more application examples to add to the above list. If you are looking for an alternative emailing solution, you're guaranteed to find a suitable product from IONOS. Do you still require Outlook tools for team collaboration? With our simpler plans, you also have the option of getting your own email address. Or you can opt directly for the complete Microsoft Office 365 package, which is also available from IONOS — both come with expert-level support.

More information about our alternative options and packages can be found here:

With the Microsoft Hosted Exchange by IONOS, you can rely on extremely high security and backup standards and all data is stored georedundantly. This means:

  • All data is stored in two independent data centers.
  • Your data is always available as exact copies and is replicated from the primary data center to the secondary data center in another location.
  • Our emergency power generators, state-of-the-art fire control and strict security ensure maximum protection against failure in every data center we operate.
  • Even in the event of natural disasters on site, georedundant storage ensures that you do not lose any data.

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