Hi @Ro ,
It states the following:
The Partner Portal application includes the following list repositories that can be used as starting points.
Are you a Microsoft Partner? If not then I'm afraid you will not be able to obtain these examples, also this is a 10 years old documentation, so there's a chance that these repositories don't exist any longer.
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(If the reply was helpful please don't forget to upvote or accept as answer, thank you)
Best regards,
Leon