vSphere / ESXi Usernames

When adding users to ESXi 4.1 you can sometimes get the error "User name or password has an invalid format".

This is fixable by checking the following:

Your password is at least eight characters in length.
Your password or username entered contained characters outside of the character types allowed.

Allowed characters:

Numbers, uppercase alphabetic characters, and lowercase alphabetic characters
Special Characters ~!@#$%^&*()_+{}|:"<>?/.,';\][=-`)

esxi

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