About us - CallTo365

About us

CallTo365 was founded by a group of people with a passion for technology and a successful track record in the IT and telephony world.

Calling with Teams

About Microsoft Teams

  • The essence of Microsoft’s vision of the modern workspace
    • The hub for teamwork in Office 365
    • Communicate by chat, meetings and phone calls
    • Collaborate with all integrated Office 365-apps
    • Adapt your workspace and get more done
    • Call directly from Office 365 and Teams
    • Connect with all your devices
  • Direct competitor of Slack
  • Included with all Office 365 subscriptions
  • The fastest growing business app in Microsoft history

The last piece of the Teams puzzle

  • Customers using Teams for calling often run into the last and most difficult part of a Teams implementation
  • It usually is disruptive and requires change
  • Many customers delay the implementation of this element of Teams for a long time or indefinitelyt
  • Our mission is to enable companies who are making the switch to Calling with Teams to do so, in a simple, non-disruptive, low-risk manner.

Our Solution

CallTo365 for


Use Teams as a telephone while retaining your existing PBX. All functionality of your PBX such as call management, forwarding, queues, minutes and telephone numbers are all retained.

CallTo365 for

SIP Trunks

Use Teams as a telephone system while retaining your current telephony provider (Direct Routing). Phone numbers, lines and minutes will remain as they have always been.

Our Infrastructure

The Team


Robbert Heemskerk


Hugo Miggels


Dennis de Ree

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