Administrator or Co-Administrator can get the error "User with that email already exists" while registering the user in User Management. Make sure if the user is not already registered under your account. If not, then the user is either:
See: Unable to add users - user already exist within another ultimate
This situation can sometimes occur in scenarios, where:
Please contact licensing support using one of the following methods:
Unable to add users - user already exist within another ultimate
Auto Approval set-up
Managing Users
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