If the authentication token lifetime is changed from "indefinite" to something else (e.g. 14 days), the connections will expire after 14 days and the connection will stay broken until we manually re-authenticate.
One workaround is to set the authentication lifetime to โundefinedโ as described in this documentation: https://docs.microsoft.com/en-us/azure/active-directory/active-directory-configurable-token-lifetime...
Another workaround is to configure Conditional Access to address this issue, as described in this article: https://blog.peterdahl.net/2018/01/09/microsoft-flow-and-azure-conditional-access-azure-mfa/
Flow connections with Azure Multi Factor Authentication (MFA) should be supported, regardless of how we set the authentication token lifetime.
This issue has been fixed. MFA will no longer cause tokens to expire after 14 days. For all confidential clients (like flows) the tokens will last until explictly revoked. Thank you.