What log would you check to confirm that the endpoint is able to reach the update cache during a failed update investigation?

To confirm that the endpoint is able to reach the update cache during a failed update investigation, checking the SophosUpdate.log is essential. This log specifically records the activities pertaining to update processes, including the attempts made by the endpoint to connect to the update cache and any associated errors that may arise during this communication.

In particular, SophosUpdate.log provides detailed insights into the status of update downloads, including timestamps, success or failure messages, and the reasons for any failures. When troubleshooting updates, this log allows technicians to identify whether the endpoint is reaching out to the update cache correctly and any potential issues in connectivity or permissions that may exist.

The other logs mentioned do not focus specifically on update processes. Event Viewer primarily logs system and application events at a broader level and does not provide the granular detail required for update failures. EndpointProtection.log deals with the protection features and status of the endpoint but not the update cache. Firewall.log records traffic passing through the firewall but does not directly correlate to the update cache connectivity. Therefore, for issues specifically related to updates, SophosUpdate.log is the most relevant and useful resource for troubleshooting.