To update the security credentials used for a specific server, select Provide Credentials from the toolbar on the Servers page. When prompted, specify the User name, Password, and Domain of the account you want to use for this server. Click OK to save the changes.
If you are using domain credentials for your Double-Take servers and you change those credentials, you will continue to receive a Windows Security pop-up in the Double-Take Console, even if you enter correctly updated credentials in the pop-up. This is an unavoidable Windows WCF communication issue, and you must update the credentials for the Double-Take servers in the Double-Take Console in order to terminate the repeated pop-ups.