Graph error : <Message id > has to be unique in a batch

Start with the batch request handling in the @microsoft/microsoft-graph-client package and reproduce the POST to Graph’s $batch endpoint using the two message IDs from the report. Trace where the duplicate-ID error is produced and add a regression test for distinct IDs that differ only by case. Done means the batch request is accepted without the uniqueness error.

Bug Report

Prerequisites

• Can you reproduce the problem?
• Are you running the latest version?
• Are you reporting to the correct repository?
• Did you perform a cursory search?

For more information, see the CONTRIBUTING guide.

Description

Batch api/@microsoft/microsoft-graph-client throws an error even when you have 2 different strings

In my outlook inbox there were 2 different emails with message ids: AQMkADI1NjdjOTA3LTA2MDctNDljNS1iM2JjLWI0YzFmOGVjYjEzMABGAAADaFuLVZilDkGMRMEras84mwcAJoSf1ZrISEGDUfN0NvJ3fgAAAgEMAAAAJoSf1ZrISEGDUfN0NvJ3fgACvV-2EAAAAA== & AQMkADI1NjdjOTA3LTA2MDctNDljNS1iM2JjLWI0YzFmOGVjYjEzMABGAAADaFuLVZilDkGMRMEras84mwcAJoSf1ZrISEGDUfN0NvJ3fgAAAgEMAAAAJoSf1ZrISEGDUfN0NvJ3fgACvV-2eAAAAA==

the only discernible difference between these 2 strings is the eAAA and EAAA but they are different nonetheless

Console Errors: [Is there any console error]
Batch err GraphError: Request Id AQMkADI1NjdjOTA3LTA2MDctNDljNS1iM2JjLWI0YzFmOGVjYjEzMABGAAADaFuLVZilDkGMRMEras84mwcAJoSf1ZrISEGDUfN0NvJ3fgAAAgEMAAAAJoSf1ZrISEGDUfN0NvJ3fgACvV-2EAAAAA== has to be unique in a batch.

Steps to Reproduce (roughly)

It seems like a message which is undeliverable sometimes produces a message id which is similar to the undelivered email

1. Have an email in the inbox
2. Reply to that email with imaginary recipients
3. You should now receive an undelivered email message in the same email thread
4. Extract the message ids on this thread
5. Batch them into an array with a structure like so

[    {
       id: '<Msg_id1>',
       url: '/me/messages/<MSG id 1/$value',
       method: 'GET'
     },
     {
       id: '<Msg id 2>',
       url: '/me/messages/<MSG id 2/$value',
       method: 'GET'
     }
]

6. Pass this as a POST request to graph's $batch endpoint via the @microsoft/microsoft-graph-client npm library
   Expected behavior: The batch request should be executed

Actual behavior: Library throws a message id should be unique error

Additional Context

Add any other context about the problem here..

Usage Information

Request ID - 9ecfb982-93c9-4f64-9d2e-331ffdefd6fe

SDK Version - 3.0.7

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