Flowdock - Logging into Rally Agile Central, but keeps getting Flowdock's login screen

Document ID : KB000115477
Last Modified Date : 20/09/2018
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I am unable to log into Flowdock. I'm logging into Rally Agile Central, but then when navigating to Flowdock I keep getting the login screen. I restarted the computer, cleared all cache and cookies of my browser , but it won't help.
One possible reason for this behavior is if:
Your Agile Central subscription is set up to authenticate using SSO but your Flowdock is not.

When you login to Agile Central and then redirect to Flowdock then Flowdock will try to authenticate you based on the username that you already entered into Agile Central. The username between Agile Central and Flowdock must match. However, if you logged into Agile Central using SSO then you probably entered your SSO username which is different than Agile Central's username. Therefore, Flowdock will not recognize your username and will default to present you with the login screen.

To resolve this you will need to log into Rally Agile Central using the Agile Central's username. If your subscription is set for SSO (and Flowdock is not) then you will need to add your Agile Central's username to the SSO Exception List. This list holds Agile Central usernames that are allowed to authenticate at AC and aren't required to authenticate with SSO.
Additional Information:
More on Agile Central's SSO setup: https://help.rallydev.com/technical-overview-implementing-single-sign-on