External users’ replies to encrypted email messages may not have been delivered in Exchange Online.
- Status
- Wiederhergestellt
- Funktion
- Mailflow - delayed delivery from Internet
- Region
- Nicht angegeben (alle Regionen)
- Beginn
- 29.10.2026, 17:00 Uhr
- Behoben
- 30.10.2026, 23:11 Uhr
- Dauer
- 30 Std. 11 Min.
Betroffen
This issue may have affected any users utilizing encrypted messages.
Ursache
An anti-spam rule was being triggered on internal domains associated with encrypted message delivery, resulting in impact.
Next steps:
- We're reviewing our anti-spam rules to better understand why they were triggered on the affected domains and prevent similar future occurrences.
This is the final update for the event.
Abschluss
We've applied an exclusion to the affected domains and confirmed after monitoring service telemetry that errors associated with failed deliveries have ceased, confirming impact resolution.
Verlauf
Alle Updates von Microsoft zu dieser Meldung, das neuste zuoberst.
- 30.10.2026, 23:21 Uhr
We've applied an exclusion to the affected domains and confirmed after monitoring service telemetry that errors associated with failed deliveries have ceased, confirming impact resolution.
- 30.10.2026, 22:59 Uhr
We’ve identified that an anti-spam rule is being triggered on internal domains associated with encrypted message delivery, resulting in impact. We’re applying an exclusion to these affected domains to exclude them from our outbound banned sender list to remediate impact.
- 30.10.2026, 22:47 Uhr
We're investigating a potential issue with Exchange Online and checking for impact to your organization. We'll provide an update within 30 minutes.
Störungen in LEXOJ abonnieren