Integrate Retarus Messaging into Your Microsoft Ecosystem

Retarus Messaging

Our enterprise-grade fax, email, SMS, and EDI enhance your Microsoft applications such as Outlook, Teams, Dynamics, Exchange and Azure environments.

Level up the Digital Workplace

Control and automate communication workflows with APIs, gateways, and applications for the exchange of structured data.

Augment Your Existing Applications

Our services complement native Microsoft capabilities, providing enhanced communication features to improve user experience and adoption.

Performance Meets Compliance

We meet the highest security and compliance standards, while delivering exceptional performance for business-critical communication.

API Call, REST (OAS), SOAP, GraphQL, SMTP
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Real-time status notifications
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Dir Sync via Entra ID or On-Prem Active Directory
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Customer Ratings and Reviews

“Retarus reacted swiftly to our enquiry, understood our needs and professionally implemented the project within a very short space of time.”

Read customer story Patrick Brandner, Application Hosting Service Delivery Manager, Solvay SA

“The collaboration with the team at Retarus was uncomplicated, and within a few weeks we had access to the interface from the Swiss data center. The integration was extremely easy for my team.”

Read customer story Riccardo Trombini, CTO, Starmind AG

“Like samedi, Retarus places great importance on data protection and compliance. Modern programming interfaces made it easy to integrate the services into our platform and they were up and running quickly and reliably.”

Read customer story Michael Siebert, Chief Principal Engineer (CPE), samedi GmbH

“The Retarus Cloud Fax Services, in combination with the Datanet CTO tool, enable the automated provisioning and billing of our fax users. At the same time, we have been able to reduce our monthly fax costs considerably in comparison to our previous, server-based solution – especially with respect to maintenance, operation and licenses.”

Read Customer Story Siegfried Ocklenburg, Cluster IS Infrastructure Manager, ABB

“Retarus and Symtrax provided us with a turnkey solution, so that we could immediately test it under real production conditions. Within two days the service was ready to use productively.”

Read Customer Story Jean-Michel Brégeat, Head of Sales, Aigle

Learn More About Specific Solutions for Multiple Microsoft Applications

Cloud Fax for Outlook

Hassle-free faxing via Microsoft Outlook with our Cloud Fax Add-In. Our native fax plugin for Microsoft Outlook makes sending and receiving faxes intuitive and user-friendly.

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SMS for Teams

Enable the receipt of SMS messages directly into a specific Microsoft Teams channel with Retarus Enterprise SMS. By integrating Retarus Enterprise SMS into Microsoft Teams, you can improve your communication flow and increase the efficiency of your team.

Fax for Windows

Send Faxes from your PC with Retarus Faxolution for Windows. No fax machine required. Get both comprehensive functionalities and an easy-to-use interface right on your PC.

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SMS for Outlook

Easily integrate SMS text messaging with your Microsoft 365 and Outlook instances. Globally reliable and secure. No in-house SMS infrastructure needed.

Want to Find Out More About Retarus Microsoft Integrations?

Everything You Need to Know

For product specifications, administrator manuals, API tutorials and more, see our documentation center.

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Interact with Our Messaging APIs

Try out our APIs functionalities in a mock-server environment without any implementation efforts.

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In Good Company

We partner with leading Microsoft Solution Partners, who implement our products into your processes.

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Frequently Asked Questions

Is Retarus compatible with both cloud and on-premises Microsoft deployments?

Absolutely. Retarus supports hybrid environments, pure cloud deployments, and traditional on-premises Microsoft infrastructure. Retarus solutions adapt to your specific deployment model while providing consistent service quality and features.

Does Retarus support Microsoft Power Automate for workflow automation?

Yes, Retarus provides connectors for Microsoft Power Automate (formerly Flow) that enable you to incorporate fax, email, and SMS messaging into your automated workflows without coding.

How do I monitor communications processed by Retarus within my Microsoft environment?

We offer an integration with Microsoft monitoring tools via a reporting API and can deliver status notifications directly to Microsoft applications like Teams or Power BI. Additionally, the Retarus Enterprise Administration Portal (EAS) provides comprehensive monitoring and reporting.