I have a client with Outlook 2007 and Exchange 2007. The Out of Office Assistant is not working. I went into IIS7 on the server and into the AutoDiscover folder, and I changed it to "ignore" client certificates. The Out of Assistant then worked, but then it kept asking the users over and over for a username and password, and they could not send or receive mail. I changed it back to accept client certificates. Now the emails are working fine, but OOF Assistant is not working again. How can I make them both work?