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Specific to MS Azure
When registering an the Smarter Suite app in Azure, the optional redirect field must be selected as a public client/native(mobile & desktop) app for mobile apps. Mobile apps have a different redirect URL structure and always start with customScheme.://. It needs to be exactly net.chemwatch.walkabout://oauth2redirect Otherwise, the mobile app won't be able to work with your AzureAD app. Please see the below image for your reference.
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