Exchange Online - ActiveSync HTTP OPTIONS Command Status

Monitoring Benefit
The Exchange Online ActiveSync HTTP OPTIONS Command status test verifies that the HTTP OPTIONS command is able to determine whether the server supports the same versions of the protocol that the client supports from the location where the test is being performed.

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 instructions to validate that the test mailbox configured for the remote probe can connect to ActiveSync from the Microsoft Remote Connectivity Analyzer. For good measure, we recommend testing with another mailbox account known to have a connection to ActiveSync. Review the results of the Exchange Online ActiveSync HTTP OPTIONS Command status tests and compare them with the results of the Microsoft Remote Connectivity Analyzer. If there is an error presented that is similar, then consider the possibility of a server or user configuration issue that is preventing the connection to ActiveSync. If there is an issue isolated to the Exchange Online ActiveSync HTTP OPTIONS Command status test, then consider the possibility of a site configuration issue preventing the connection to ActiveSync.

Common warning or error result(s) and potential solutions to resolve the issue(s).

Refer to the following URL(s) for troubleshooting ActiveSync HTTP OPTIONS Command issue(s) related to the Exchange Online:

Exchange ActiveSync in Exchange Online | Microsoft Learn

The ActiveSync OPTIONS command returned an HTTP 401 Error - Connectivity Analyzer | Microsoft Learn