htps://social.technet.microsoft.com/Forums/windows/en-US/bebfdeb8-3aab-44af-bf18-d7534808422a/after-password-change-in-ad-outlook-will-not-prompt-to-enter-credentials-for-a-day-or-more?forum=outlook

My question is in regards to the above "solved" issue. We currently use DirSync to synchronize our on-premise AD with Azure, and it seems to take up to 12 hours for Outlook to ask for/recognize the new credentials. I understand that there is a default token life of 10 hours, but is there any way to modify that time at all?

That is an ADFS setting.

To see your current settings for the TokenLifetime use the following PowerShell command:
Get-ADFSRelyingPartyTrust "<Your Trust Name>"

You can alter it via the Set command.

Additionally see:
https://technet.microsoft.com/en-us/library/ee892326.aspx
and
https://technet.microsoft.com/en-us/library/ee892363.aspx

We don't currently have ADFS set up in our environment. We just use DirSync for same sign on, not single sign on. Is there any sort of setting I can modify to reduce the token life within Exchange online itself?