M
Marek Kiš
Hello,we use ADFS (Windows Server 2016). We also have Exchange hybrid environment configured. All recipients are in the cloud (Exchange Online). We use Azure AD Connect for syncing on-prem user to cloud obviously. We use service accounts for sending notifications via SMTP (smtplib library in Python). We have this setup for years and everything was fine until July 18 2024. From that date we are unable to send emails via service accounts as we receive this error: "Authentication unsuccessful, federated STS service was unreachable." - we did not update smtplib (same error is showing when trying t
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