As of July 14, 2025, reports continue to pour in about ongoing issues affecting access to Exchange Admin Center for some administrators and mailbox accessibility problems for other users. This comes as a continuation from previous disruptions reported on July 10th through July 11th. Microsoft acknowledged that a multi-layer caching issue within their processing infrastructure led to excessive backend component requests, causing high resource utilization which ultimately impacted mailbox access for end-users.
A comprehensive blog post by the same author documented similar issues faced in early July and provides insights into how these disruptions affect various aspects of using Exchange Online services. The post highlights several reported incidents including EX1113061 and EX1113342, which were related to Exchange Online access problems starting from July 10th, followed by a detailed account of incident EX1113110 on July 11th detailing service disruptions affecting all users attempting to connect via any Exchange Online method.
Understanding the Impact and Mitigation Strategies for Ongoing Microsoft Cloud Issues
Similar questions
What is causing access issues to Exchange Admin Center?
When did the mailbox accessibility problems start?
How long have these disruptions been going on?
Is Microsoft aware of these issues?
What caused high resource utilization according to Microsoft?
How many times were backend components requested excessively?
Are there any updates since July 10th through July 11th regarding this issue?
Has Microsoft provided a timeline for when the problem will be fixed?
Can end-users do anything to mitigate these issues while they persist?
Is there an alternative way for administrators to manage mailboxes during this time?