Office 365 auto logging​ in

Here's a rundown of an issue I'm having.

We recently just migrated our mailboxes from exchange to office 365. We have a few computers set up to auto login generic accounts with little permissions and then allow the shop users to log in to Outlook web access through a browser to check their company mail. This worked fine for exchange, but now that we are on office365 its not so simple anymore.

Now when they go to Outlook.office365.com and log on. Either it will ask for their credentials and then try and log on to the Windows account the PC is logged on to or it will log on to their account but then stay logged on. Even if remember me is not selected.

Is there a way to set it to auto log the user out after a certain amount of time? As well as to not log on to the Windows account the computer is signed into

Thanks!