Disabled User - Are they automatically added to the Restricted Users list?

Disabled User - Are they automatically added to the Restricted Users list?

A user account was temporarily disabled, since the user was on leave for a few months.  It appears the user account was then automatically added to the Restricted Users list.  I do not recall enabling such a setting.  Is there a way to modify this setting?  The user must enroll again, when this happens.  Would someone explain this behavior?  Thanks in advance

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