!!! Overview
[{$pagename}] is an [OAuth 2.0], unregistered [OAuth Parameters Registry], [parameter] used by [Microsoft] that extends the [OAuth 2.0] [Authorization Code] [Grant Type] to allow the [Authorization Server]s within [Microsoft Identity Management Product Line] to make a call on On-Behalf-Of the first [Resource Owner].[{$pagename}] the value must be set to [on_behalf_of] for the On-Behalf-Of [Grant Type]

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [Microsoft identity platform and OAuth 2.0 On-Behalf-Of flow|https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-on-behalf-of-flow|target='_blank'] - based on information obtained 2019-06-25