Hi Jean,
Thanks for your feedback.
Recently, we have received some reports that some customers got the similar notification which was false positive.
Given this situation, please run the following PowerShell cmdlet on the ADFS server to check via the Windows Azure AD Module for Windows PowerShell:
Get-MsolFederationProperty -DomainName “the federated domain name”
Then, please post all of the outputs of the cmdlet.
Thanks,
Claud