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Outlook | Web | Outlook on the web for business | Email
Sending, receiving, and organizing email in Outlook on the web for business
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Hi Valerie
Thank you for reaching out.
Based on my research, Microsoft has officially posted an active service degradation advisory in the Microsoft 365 admin center regarding this outage (tracked under incident ID MO1550821). They are currently investigating a widespread service degradation preventing users from connecting to multiple Microsoft 365 services, including Exchange Online and Outlook on the web.
Currently, Microsoft is actively investigating the issue on their end, so there is no action needed from end users at this time.
In the meantime, please ask your IT administrator to monitor MO1550821 under Health > Service health for further updates. Having them use the "Report a problem" feature will also help Microsoft log the impact on your organization's tenant.
In case you do not know who your IT admin is, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support
I hope the information I shared earlier was somewhat helpful in addressing your issue. Hope they deploy a fix soon.