My uses' email address has changed in my IDP, is there anything I have to do on Keeper side?

If your user's email has changed in your identity provider, you can simply add an alias to the user's identity in Keeper. This can be accomplished using the enterprise-user command. For example: enterprise-user --add-alias new_email@acme-demo.com user@acme-demo.com. This command will only allow aliases to be created with reserved domains. To learn more about Keeper Commander, visit the documentation.