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18/07/2023 08:32:00 AM (GMT)
NHSmail Reference : INCXXXXX
Microsoft Reference : EX649175
Issue Status : OPEN
Issue Description : Users may be unable to send Exchange Online email messages.
More info : Affected users may receive the following error “503 5.5.1 bad sequence of commands”
Current Update : 18/07/2023 08:32:00 AM – Microsoft are reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.
Scope of impact : Impact is specific to some users who are served through the affected infrastructure.
Next update by : Tuesday, July 18, 2023, at 9:30 PM UTC
Tagged: EX649175 INCXXXX
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