Microsoft Exchange Message Trace Agent Integration Docs Update Request

[jlim0930]

Describe the enhancement:
important context is missing from elastic documentation regarding permission configuration for the Microsoft Exchange Message Trace agent integration

Describe a specific use case for the enhancement or feature:

Microsoft Exchange Message Trace agent integration under "Service App Configuration" (github.com/elastic/integrations) with heading "Configuring with OAuth2" (public) should make reference to the specific Microsoft article describing how to setup permissions when performing app registration in Microsoft Entra ID for the outlook reporting web service. Otherwise, the note regarding ReportingWebService.Read.All is missing important context.

[botelastic]

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