Question
Please tell me the retention period for HENNGE One service logs.
Answer
The log retention periods for each service during the contract period are as follows.
You can check each type of log from the user or Administration screens of each service.
Please note that the retention periods listed below are subject to change without prior notice. Thank you for your understanding.
| Service Name | Item | Period |
| HENNGE Access Control | Access Logs, Batch Registration Logs, Sync Logs, Admin Operation Logs, User Operation Logs, Basic authentication (legacy authentication) Access Logs* *1 Only logs for basic authentication from December 1, 2025, onward are available for viewing. | Never Expires |
| HENNGE Secure Browser | Access Logs are included in HENNGE Access Control. * Other information, such as accessed sites, is not collected. | Never Expires |
| HENNGE Device Certificate | Access Logs are included in HENNGE Access Control. | Never Expires |
| HENNGE Email DLP | [History] menu search results * Administration * The contents of files sent with HENNGE Secure Download can be viewed for 31 days after sending. | 3 months |
| Suspension tray history, Approval tray history * User screen | 1 month * Up to 100 entries | |
| Files History (history of files sent with HENNGE Secure Download) * User screen * The contents of files sent with HENNGE Secure Download can be viewed for 31 days after sending. | 3 months * Up to 100 entries | |
| Files History (history of files sent with ZIP encryption) * User screen | 1 month * Up to 100 entries | |
| HENNGE Email Archive | Operation Log, Archive Search Log | Never Expires |
| Archived emails | Contract period | |
| HENNGE Email Archive Modern | Operation Log | 10 years |
| Archived emails | Contract period | |
| HENNGE Secure Transfer | Transfer Logs | 1 year |
| Domain Operation Logs * Only logs from December 1, 2025, onward are available for viewing. | 1 year | |
| HENNGE Secure Download transfer history | 3 months | |
| HENNGE Cloud Protection | Detection logs, system events * Logs and events viewable on the Administration screen are for the most recent 180 days. | Never Expires |
| HENNGE File DLP | Background Tasks, Admin Operation Logs | Never Expires |
| HENNGE Tadrill | Alerts | 1 year |
| Training results | Never Expires | |
| HENNGE Endpoint & Managed Security | Ticket management system | 5 years |