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It is essential to note that if a user is deactivated or set as unavailable after being assigned to an XTM Cloud project, no notifications will be sent to anyone to inform them.
When you deactivate a user, it is impossible to search by their username (by selecting Projects → Project list → Advanced Search). When an Advanced Search is performed for a username, the filter searches for an exact string so it cannot find the user, because it is not assigned to the workflow.