You will access the application directly with an App URL or from the home.dynamics.com URL.
After logging into home.dynamics.com, you should see a tile that displays:
Selecting the tile will start the Coordinat-IR App
The App is divided into three areas:
Center Content (Forms, Views, Dashboards)
Left Navigation (Alerts, Investigations)
Area Selector (highlighted by the red box in the screenshot)
the Area Selector provides access to the four App area:
Response - Alerts and Investigations area.
Threat - Indicator classifications management.
Client - Information about Clients Infrastructure.
Reference - Reference information including Artifact Types.