Dummy Users - EPDM

Our company uses Windows Login and the security is rather strict so to test workflows, permissions, etc. I usually have to make a "best guess" and get a couple of guinea pigs to test. If I could create dummy users for each group, I could test easier. However, the Win login does not seem to want ot allow me to create users not in the AD. Anyone else experienced this? A workaround?

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