When opening the ArcGIS Field Maps mobile app, the following error message is returned:
Error: Field Maps won't be able to communicate with your organization until you have successfully signed in again.
Note: This error occurs for Open Authorization (OAuth) and Security Assertion Markup Language (SAML) users.
The OAuth setting in the ArcGIS Field Maps mobile app is set to Default.
Set the OAuth setting in the ArcGIS Field Maps mobile app to In App.
Note: Update to the latest version of iOS or Android operating system, and the ArcGIS Field Maps mobile app.
For iOS devices
For Android devices