@tkieltyIHC ,
Great question! This all depends on how you house your employee database and whether or not we have an integration that supports syncing them automatically. You are welcome to check out our integrations, (both official Constant Contact integrations, and third-party integrations), by clicking on the Integrations tab at the top of your Constant Contact window.
If not, it would require manual effort to remove old employees and add new employees, but this can be done by deleting contacts or uploading a list of unsubscribed contacts, and uploading a list of new contacts.
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