Exchange Online - EWS Status

Monitoring Benefit

The Exchange Online EWS status tests verify that the EWS service is available to logon for your applications and that a Free Busy lookup can be performed for the Exchange Online user mailbox (and an Exchange hybrid user mailbox when hybrid monitoring features are enabled). These monitoring tests also check that the network latency is within an acceptable range.

How do we verify the monitoring test results?

From the ENow web server, open the following URL to use the Microsoft Remote Connectivity Analyzer:

Microsoft Remote Connectivity Analyzer: Test Input

Follow the above instructions to validate that the Exchange Online user mailbox configured for the EWS status tests can connect to EWS from the Microsoft Remote Connectivity Analyzer. For good measure, we recommend testing with another mailbox account known to have a connection to EWS.

Review the results of the Exchange Online EWS status tests and compare them with the results of the Microsoft Remote Connectivity Analyzer. If a similar error is presented in both, then consider the possibility of a server or user configuration issue that is preventing the connection to EWS. If the issue is isolated to the Exchange Online EWS status test, then consider the possibility of a site configuration issue preventing the connection to EWS.

Common warning or error results, and potential solutions

Adjust the Network Latency threshold settings by opening the ENow Admin Console and selecting:

Server > Monitoring Policy > Thresholds > Microsoft 365 > Exchange Online > Microsoft 365 > EWS Logon Latency, Free Busy Lookup Latency (Exchange Online), and Free Busy Lookup Latency

or

Server > Monitoring Policy > Thresholds > Microsoft 365 > Exchange Online > Remote Probes > EWS Logon Latency

or

Server > Monitoring Policy > Thresholds > Microsoft 365 > Exchange Online > Ecloud-Internet > EWS Logon Latency

Refer to the following for troubleshooting EWS Logon issues related to the Exchange Online user mailbox settings:

Microsoft Entra authentication & authorization error codes | Microsoft Learn

Refer to the following for troubleshooting Free Busy issues related to the Exchange Online user mailbox required settings:

Set your work hours and location in Outlook | Microsoft Support