Update - Information Strategy and Services (ISS) has identified the cause of the service disruption and is working on a resolution.
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This includes e-mail and calendar services through Microsoft, Microsoft Webmail, Microsoft Azure, and so on. ISS has observed improvement since noon, but is still seeing some delays in processing across multiple products. ISS will be circling back to reassess any ongoing issues as the afternoon progresses.
What is the issue:
This is an international issue that Microsoft is working on. Mitigation efforts continue, and ISS continues to monitor progress. Users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and other Microsoft products.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Sep 02, 2026 - 14:17 MDT
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This includes e-mail and calendar services through Microsoft, Microsoft Webmail, Microsoft Azure, and so on. ISS has observed improvement since noon, but is still seeing some delays in processing across multiple products. ISS will be circling back to reassess any ongoing issues as the afternoon progresses.
What is the issue:
This is an international issue that Microsoft is working on. Mitigation efforts continue, and ISS continues to monitor progress. Users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and other Microsoft products.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Sep 02, 2026 - 14:17 MDT
Update - Information Strategy and Services (ISS) has identified the cause of the service disruption and is working on a resolution.
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This includes e-mail and calendar services through Microsoft, Microsoft Webmail, Microsoft Azure, and so on ISS is still seeing delays in processing across multiple products.
What is the issue:
This is an international issue that Microsoft is working on. Mitigation efforts continue, and ISS continues to monitor progress. Users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and other Microsoft products.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Sep 02, 2026 - 07:50 MDT
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This includes e-mail and calendar services through Microsoft, Microsoft Webmail, Microsoft Azure, and so on ISS is still seeing delays in processing across multiple products.
What is the issue:
This is an international issue that Microsoft is working on. Mitigation efforts continue, and ISS continues to monitor progress. Users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and other Microsoft products.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Sep 02, 2026 - 07:50 MDT
Update - We are continuing to work on a fix for this issue.
Sep 02, 2026 - 07:46 MDT
Sep 02, 2026 - 07:46 MDT
Update - Information Strategy and Services (ISS) has identified the cause of the service disruption and is working on a resolution.
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This included e-mail and calendar services through Microsoft. Many messages are flowing normally, but ISS is still seeing delays in processing.
What is the issue:
Microsoft has posted their efforts concerning this ongoing issue. Mitigation efforts continue, and ISS continues to see services improving. But, users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and so on.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Incident:
Sep 01, 2026 - 17:02 MDT
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This included e-mail and calendar services through Microsoft. Many messages are flowing normally, but ISS is still seeing delays in processing.
What is the issue:
Microsoft has posted their efforts concerning this ongoing issue. Mitigation efforts continue, and ISS continues to see services improving. But, users continue to be impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and so on.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Incident:
Sep 01, 2026 - 17:02 MDT
Identified - Information Strategy and Services (ISS) has identified the cause of the service disruption and is working on a resolution.
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This included e-mail and calendar services through Microsoft.
What is the issue:
Microsoft has posted their efforts concerning this ongoing issue. Mitigation efforts are in progress, and ISS is seeing services improved but users are still currently impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and so on.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Incident:
Sep 01, 2026 - 09:04 MDT
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products. This included e-mail and calendar services through Microsoft.
What is the issue:
Microsoft has posted their efforts concerning this ongoing issue. Mitigation efforts are in progress, and ISS is seeing services improved but users are still currently impacted.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online, including e-mail, calendar, teams messages, and so on.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on resolving this as quickly as possible.
Incident:
Sep 01, 2026 - 09:04 MDT
Investigating - Information Strategy and Services (ISS) is aware of and currently investigating a service disruption.
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products.
What is the issue:
Microsoft posted concerning this ongoing issue. Details are sparse, and the investigation is ongoing.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on identifying the cause and resolving it as quickly as possible.
Incident: 3086456
Aug 31, 2026 - 10:31 MDT
What service is affected:
Users are having difficulties with accessing or using Exchange Online, and all associated office products.
What is the issue:
Microsoft posted concerning this ongoing issue. Details are sparse, and the investigation is ongoing.
Who is impacted:
All users (students/staff/faculty) that utilize Exchange Online.
Workarounds (if any):
There are no workarounds available at this time.
Thank you for your patience while our team works on identifying the cause and resolving it as quickly as possible.
Incident: 3086456
Aug 31, 2026 - 10:31 MDT
About This Site
Welcome to the CU Anschutz ISS and CU Denver OIT system status page. ISS will provide information about service interruptions here.
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