Thank you for posting your question on the AppDynamics Community.
A SAML authentication failure occurs mainly due to one or several of the following reasons:
The credential you pass in the SAML Assertion is incorrect
Invalid SAML Assertion
SAML Assertion has expired
The account trying to access Controller is not associated with the subscription in AppDynamics system
Please make sure that the email address you are using is the right one and let us know if you are able to access the Controller. Feel free to update the thread if you still having the issue.
If you have already figured out how to fix the SAML issue, please post your solution so as to benefit others with similar issues.
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