For the past few days users who connect to our exchange using outlook over RPC are complaining that outlook keeps on asking for a password, and once you input the password it keeps asking again. after couple of hours they can connect with no problems and after an hour or 2 problem persists again. When you go to OWA it works fine. Users connecting to exchange locally have no problems. My laptop is configured to connect over RPC and even tho im on local LAN it still asks me for password, once i input password it asks me again and again.
any idea ?