Hi, Is "All Users" group , a standard group or a customised group

Hi,
Is "All Users" group , a standard group or a customised group? Does all the users in the environment are implicitly added in the "All Users" group?
If so, I want my process to be initiated by every user present. In other words, all the users have to be given "initiator" right to my process.

Thanks in advance.
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OriginalPostID-64384

OriginalPostID-64384

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