Sometimes users are not able to access SPP from specially remote locations, what could be the cause of this? Automatic Login in Intranet Zone is enabled, and also all the Local Intranet security settings are lower.
Remote location!! Sometimes or all the times for all users from the same remote location? Are you going through some sort of Proxy Server in between the locations and using Integrated Security?
Its not sometimes, but it happens to specific users only, not all the users. Some are accessing the SPP from the same location, but some r not. We have different domains which are communicating with each other with same security.
Tell them to start their browser and on the Tools menu they chooseInternet Options. Then under Security they choose to either click onDefault level and then OK or to choose Custom level and there scrolldown till they see "User authentication". Please ask them to be surethat "Prompt for user name and password" is chosen.