Use the G Suite Toolbox to debug issues you have with 'G Suite services'.
Browserinfo is a browser based debugging tool to capture client side information. You can look for obvious information that might impact users experience on the Internet.
Log Analyzer provides a way to analyze log files generated by Google products. For example, ChromeOS Logs, G Suite sync for Microsoft Outlook, Google Cloud Directory Sync, etc.
Log Analyzer 2 is able to handle large log files, with lot of filtering abilities.
Messageheader allows users to analyze SMTP message headers which often have sufficient information to help identify root cause of slowness. In addition to detecting misconfigured servers it can also explain mail routing which is often related to the source of delivery delay.