When trying to access Workspaces via Mobile app from the external network the application is stuck on the background image.
When trying to log into Workspaces via Token Authentification from the external network, using the wrong password you do not receive feedback from the application, the page is kept on loading.
The cause is settings for DMZ (point of external access for users to your services and applications). The fault lays in the wrong configuration of Authentification method for Workspaces in Forefront TMG.
Solution / Workaround:
If you are using TMG (Forefront Threat Management Gateway) to provide secure access for your users you should review the settings for Workspaces Application - the Authentification method should set up as 'Basic/None',
For more information: