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How to Check Exchange Web Services (EWS) API Status and Fix Connection Errors
Question details
Users need to know how to check the status of the Exchange Web Services (EWS) API and troubleshoot application connection failures.
- Product
- Microsoft Exchange Web Services (EWS)
- Device & OS
- not provided
- Scenario
- Using a custom or third-party application utilizing the EWS API to centrally retrieve and manage mailbox email.
- Observed behavior
- The application frequently reports forcibly closed connections or other connection failures, and Microsoft 365 standard support does not provide specialized EWS API development assistance.
Ensure you have access to your application's internal error logs and administrator credentials for the Microsoft 365 Admin Center to check general service health advisories.
Review Application Logs and Microsoft 365 Service Health
Determine if the connection failure is caused by a temporary Microsoft 365 service outage or a localized application error by checking service dashboards and application logs.
Before altering your application code, it is critical to identify whether the issue originates from the server side (Exchange Online) or the client side. 'Forcibly closed connection' errors often result from server-side throttling or temporary service degradation.
Log into the Microsoft 365 Admin Center. Navigate to Health > Service health in the left sidebar. Look for any active advisories or incidents related to Exchange Online or Exchange Web Services.
Open your application's diagnostic logs. Search for specific EWS Managed API exception codes or HTTP status codes (such as 500, 503, or 429 Too Many Requests) that coincide with the connection drops.
Cross-reference the exact error codes you found with the official Microsoft Exchange Web Services documentation to understand the specific triggers for those API call failures.
Seek Specialized Support via Microsoft Q&A
Because standard Microsoft 365 Business Exchange support does not cover custom EWS API development, utilize the specialized developer community to resolve complex coding and connection issues.
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Frequently Asked Questions
Why does standard Microsoft 365 support refuse to help with my EWS application error?
Microsoft 365 Business Exchange support is scoped to handle general service availability, mailbox configuration, and administrative issues. Specialized API development, custom application troubleshooting, and EWS Managed API debugging fall outside their standard support boundaries and are directed to developer communities.
What commonly causes a 'forcibly closed connection' in Exchange Web Services?
This specific error is frequently caused by network timeouts, incorrect SSL/TLS configurations, or throttling policies enforced by Exchange Online. When an application exceeds the allowed concurrency or request limits, Exchange will forcibly close the connection to protect server health.
Is Exchange Web Services (EWS) being deprecated?
Yes, Microsoft has announced the deprecation of EWS in Exchange Online. Developers are strongly encouraged to migrate their applications to the Microsoft Graph API, which is the modern standard for accessing Microsoft 365 mailbox data.
