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Microsoft investigates global Exchange Admin Center outage

Exchange Online

Microsoft is investigating an ongoing outage that is blocking admins worldwide from accessing the Exchange Admin Center (EAC).

The company tagged this ongoing issue as a critical service issue tracked under EX1051697 on the Microsoft 365 Admin Center, and it says that "at this time appears to be a global issue."

Since the outage started two hours ago, affected IT administrators have reported seeing "HTTP Error 500" errors when attempting to log into the Exchange admin center portal.

However, as Microsoft also suggested, some admins have been able to access the admin center via https://admin.cloud.microsoft/exchange#/.

"We've identified increases in error spikes and are investigating these further. Additionally, we're reviewing recent changes made to the service as a potential root cause," Microsoft says.

"We've received reports that admins are able to access the EAC using https://admin.cloud.microsoft/exchange#/ as a workaround. We're still verifying this and will provide validation on this shortly."

Exchange admin center outage

​In a subsequent message center update, Redmond said its engineers have reproduced the issue internally and collected additional diagnostic data to assist with the troubleshooting process.

Last month, the company mitigated another outage that prevented Outlook on the web users from accessing their Exchange Online mailboxes.

Days later, it also addressed a week-long Exchange Online outage that caused delays and failures when sending or receiving email messages.

This is a developing story...

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