Some of my clients give me an email account with their domain. I recently stopped working with one of them, so my credentials no longer are valid. I don't want to delete that account in Outlook in case I ever need those messages one day and in case I resume working for them. How can I stop Outlook from trying to sync that account? I tried changing the schedule, but Outlook still syncs it and all of my other accounts every 7 minutes. It's annoying to have the Outlook icon bouncing out of the dock.