An ongoing outage that prevents administrators of Microsoft 365 with business or enterprise subscriptions from accessing the admin centre is being looked into by Microsoft after discovering and blocking access to the Microsoft 365 Admin Centre after experiencing an outage that keeps administrators from using crucial management tools at the early hours of Thursday July 24th, 2025.
And as a result, some concerns regarding service reliability have been raised by the problem, which first surfaced on July 24, 2025, and continued into the next day. This is the second incident of this kind this week.
Given how much Microsoft 365 is used by organizations for operations, this disruption highlights the weaknesses in cloud-based infrastructure.
IT operations across enterprises may come to a halt as a result of the outage, which has prevented administrators from managing user accounts, monitoring service health, or performing necessary adjustments.
Through its service health status page, Microsoft noted the issue and advised impacted customers to look for updates outside of the unavailable portal.
When trying to log in, thousands of Microsoft 365 administrators with business or enterprise subscriptions are immediately impacted and see “Runtime Error” warnings.
End users are impacted because administrators are unable to respond quickly to service issues, which may cause delays in fixing difficulties with Teams, email, and other applications.
Businesses that rely on real-time administrative access, such as those in the healthcare and educational sectors, suffer notable productivity losses. For example, millions of people were unable to communicate during comparable outages earlier in July.
The administration of Microsoft 365 services, such as Teams and Exchange Online, is centralized in the Admin Centre. The current problem comes after Eastern US infrastructure failed to reach performance standards on July 24, causing a similar outage.
In order to give impacted organizations access to the most recent information, the company is currently monitoring the ongoing service degradation issue on its official service health status page, even though it has not yet revealed which regions are now affected.
Microsoft is investigating a potential issue that may be preventing administrators from accessing the Microsoft 365 admin centre from a statement from the company..
“Information about this issue is posted on this page because Microsoft 365 administrators may be unable to access the admin centre to get Service health information.”
Following customer reports of server issues when attempting to login to the portal, Redmond had to address a problem that was preventing access to the Microsoft 365 admin centre for the second time this week. The company confirmed another such occurrence on Thursday.
A ‘Runtime Error’ was prohibiting access for affected administrators, as the corporation disclosed on Wednesday in an issue alert (MO1120879) that BleepingComputer was able to view.
“Any admin served through the affected section of service infrastructure in the Eastern US region attempting to access the Microsoft 365 admin centre may have been unable to do so,” Microsoft stated.
“A portion of regional service infrastructure responsible for access wasn’t performing at the expected thresholds, and as a result impact occurred.”
Redmond resolved another outage in January that was classified as a critical service issue. This outage blocked login attempts and stopped administrators and users from accessing the admin centre and some Microsoft 365 services.
The Office web apps and admin centre were unavailable due to a Microsoft 365 outage a month prior, which resulted in users seeing “We’re experiencing a service outage” notifications when they tried to access their Microsoft 365 apps through a web browser.
Microsoft says it is monitoring the issue under MO1120879, but it has not revealed the precise number of impacted users. This continues a trend of 2025 outages, which also included a 19-hour worldwide disruption earlier in July that was caused by configuration modifications.
Although reports indicate a wider global reach, encompassing Europe and Asia, the outage primarily affects administrators who are routed through the impacted infrastructure in the US East area.
Not every area is affected equally; customer services like Outlook.com continue to function. Nonetheless, extensive access problems have been recorded by enterprise users in the US, UK, and other countries.
Initial inquiries reveal that the regional service infrastructure is operating poorly, leading to issues with access and authentication.
Like previous problems with defective updates or routing difficulties, Microsoft ascribes it to a part of the system failing to meet expected criteria. Unlike previous security breaches, there has been no recorded evidence of cyberattacks.
For updates, Microsoft advises using different URLs, such as the service health dashboard or the direct access to the Microsoft 365 admin centre. For up-to-date information, administrators should keep an eye on the official Microsoft 365 Status account on X.
The business is implementing fixes and suggests temporary remedies like deleting browser data or attempting other networks.
From updates regarding the blocked access and outage in which the occurrences were documented
GMT+5:30, July 24, 2025, 7:24 AM: Microsoft acknowledges that access issues are being investigated; runtime faults have been extensively reported.
GMT+5.30, July 24, 2025, 6:45 AM: The focus of the initial alerts is the infrastructure in the Eastern United States.
Official tracking begins at 6:24 AM GMT+5:30 on July 24, 2025, when the first consumer reports appear.
As of now, Microsoft is still working on mitigation as of July 26, 2025, and a complete resolution is expected soon in the coming hours or days once it is known. It is recommended that companies create backup plans in case of frequent cloud outages.
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