After configuring the SEP Policies in Advanced Threat Protection (ATP) Platform, proxy and submissions settings in the External Communications policy on the Endpoint Protection Manager (SEPM) are reset to default values.
If clients need to connect to ATP through a proxy, this will result in multiple clients showing "Authentication Pending" status under Enrollment Statistics indefinitely.
ATP currently utilizes the PUT method to update the Private Cloud settings through the SEPM's REST API. This will overwrite the existing External Communications policy with the configured settings. Utilizing the PATCH method will edit the existing policy with the new settings.
Attempting to update the Private Cloud settings through the SEPM's REST API by using the PUT method will also result in this behavior.
To check whether this is a known issue
If the Proxy settings no longer point to a proxy that was previously configured...