UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/53.0.2785.143 Chrome/53.0.2785.143 Safari/537.36

Steps to reproduce the problem:
1. Access chrome://chrome-signin and enter my email
2. I get redirected to the SAML login page
3. Fill in authetication details
4. I get a popup saying "Uh-oh, service unavailable and sync is not enabled

What is the expected behavior?

What went wrong?
SAML authentication succeds but the sync setup fails after SAML login process.

Did this work before? Yes About 3 weeks ago

Chrome version: 53.0.2785.143  Channel: stable
OS Version: Ubuntu 16.04 and 16.10
Flash Version: 

If I initiate the sync setup from the "Settings -> Sign in" menu it still fails to setup sync after submitting the SAML login, but I get a 404 error page instead of the popup.

Sync used to work before with the same SAML-enabled account.

FWIW sync works fine with a different profile on the same browser using a personal gmail account.

Attached is the output of the chrome://signin-internals page
 

Deleted: signin-internals.png 155 KB

	signin-internals.png 155 KB View Download