Access to Time Series Insights is handled by acquiring an access token for a Application in Azure Active Directory which is being given access to time series insights according to the documentation.
In a scenario where my application is running in Azure App Service, is it possible to skip the step of creating a application in AD and use the Managed Identity of App Service to access Time Series Insights this way? How can i obtain the Access Token in this scenario?
yes you can absolutely do that. In that case, you'd follow the Azure AD guidance on how to acquire tokens for resources as an MSI. Please see the documentation here. The resource would be https://api.timeseries.azure.com/ and one of the optional properties is required. Note that you'd also have to first grant the MSI either the reader or contributor role for your TSI environment.