Integrate Retarus Messaging into Your Microsoft Ecosystem
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
Real-time status notifications
Dir Sync via Entra ID or On-Prem Active Directory
API Call, REST (OAS), SOAP, GraphQL, SMTP
Real-time status notifications
Dir Sync via Entra ID or On-Prem Active Directory
Customer Ratings and Reviews
“We chose Retarus because they offered the most harmonized overall concept. In addition to the flexibility, speed and price-performance ratio, we were also convinced by their personal approach and the transfer of know-how.”
Read customer story Dominik Reichle, Channel Specialist EDI, Leuze
“We are delighted to have Retarus as a reliable and forward-thinking partner at our side.”
Read customer story Sales Project Management, Engelbert Strauss GmbH & Co. KG
“The system and process are stable – an order confirmation rate of more than 97 percent speaks for itself.”
Read customer story Ute Bätz, IT Operations, IT & Process Management , EagleBurgmann Germany GmbH & Co. KG
“Retarus has proven to be a reliable partner and has made a decisive contribution to the digital transformation of our accounting processes.”
Read customer story Anja Harms, Head of Accounting, Keller & Kalmbach
“Our mail users have no troubles with using the processes related to Retarus. Releasing spam, maintaining personal black- and whitelists and understanding the need of an antispam/antimalware protection.”
Read full review IT Services, Management / Business Consulting
Learn More About Specific Solutions for Multiple Microsoft Applications
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.
Interact with Our Messaging APIs
Try out our APIs functionalities in a mock-server environment without any implementation efforts.
In Good Company
We partner with leading Microsoft Solution Partners, who implement our products into your processes.
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.