I work for an IT firm. and one of our client companies is having an issue which recently started as of Friday of last week. Here is what is happening.. The client company used to be able to just log in to outlook 2003 and it wouldnt prompt them for their outlook password. Now since Friday of last week,every so often when they log in or hit send and receieve or other functions within outlook.. It will prompt them for their password.... They are using Windows XP Pro. Outlook 2003.
They are using kerberos/NTLM authentication.