Explanation
The reason that this certificate authority integration test connection failed is that fetching the root certificate from CA failed. The root certificate from CA is a certificate that validates the identity and trustworthiness of the certificate authority (CA) that issues certificates for devices. Workspace ONE UEM needs to fetch the root certificate from CA to verify and manage certificates for devices. If fetching the root certificate from CA failed, it could indicate that there is a problem with CA configuration, connectivity, or availability. Workspace ONE UEM will not be able to connect to CA or issue certificates for devices, and the certificate authority integration test connection will fail.

Explanation
The connection flow that should be examined to gain this insight is device connection to Device Services.
Device Services is a component of Workspace ONE UEM that handles device enrollment, management, and communication. Device Services also hosts the AWCM service, which is responsible for delivering push notifications to devices. If devices have stopped updating their last seen time within the console, it could indicate that there is a problem with device connection to Device Services. The administrator should check and resolve any issues with device connection to Device Services.

Explanation
The component that should be focused on when troubleshooting this device connectivity issue to VMware Workspace ONE UEM is Device Services. Device Services is a component of Workspace ONE UEM that handles device enrollment, management, and communication. Device Services also hosts the AWCM service, which is responsible for delivering push notifications to devices. If Device Services is not working properly, devices may not be able to check in with Workspace ONE UEM or receive profiles, commands, or policies3.

Explanation
The statement that describes the root cause of this issue is that the protocol https:// is missing in the Secure Email Gateway hostname value. The Secure Email Gateway hostname value is the URL that Workspace ONE UEM uses to connect to the Secure Email Gateway edge service on UAG and perform email management tasks, such as quarantine, wipe, or block. The protocol https:// is required to indicate that the connection is secure and encrypted. If the protocol https:// is missing, Workspace ONE UEM will not be able to connect to the Secure Email Gateway edge service, and the test connection will fail. The administrator should add the protocol https:// to the Secure Email Gateway hostname value.

Explanation
The strategy that accurately describes the solution for this problem is running the keytool import targeting the new certificate. The AWCM keystore is a Java keystore file that contains the SSL certificates used by AWCM to establish secure connections with devices and other components. If the SSL certificates are rotated on IIS and the load balancer, but not on the AWCM keystore, then AWCM will not be able to communicate with devices using push notifications. To resolve this issue, the administrator must import the new SSL certificates into the AWCM keystore using the keytool command2.