I have a 5508 series controller and have guest accounts setup for each month of the year. The accounts activate at midnight on the first day of the month and expire at 11:59pm on the last day of the month. They are active 7 days a week. I am having an issue at midnight of each new day when you cannot authenticate using the credentials. The account shows up as active but it fails authentication. If you wait a few minutes or so, you can authenticate with the credentials. It will also deauth anyone who is connected at midnight and they will have to wait and reauth after a few minutes. I'm curious if this is expected behavior. My thought is the account should be "seamless" 2 hours a day, 7 days a week during the time it is identified as active in the scheduling.
I have this problem too.