> Source: [sk113475](https://support.checkpoint.com/results/sk/sk113475)

# sk113475 - FDE SSO is not working after resuming from hibernation

| Property | Value |
|----------|-------|
| Solution ID | sk113475 |
| Date Created | 2016-09-20 |
| Last Modified | 2016-09-26 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |

## Symptoms

- * When resuming from standby/hibernation both Preboot and Windows authentication are needed.
* The following appears in Dlog1 log (C:\\ProgramData\\CheckPoint\\Endpoint Security\\Full Disk Encryption):  
  "Enabled CAD sequence from GPO, ignoring hibernation SSO"

## Cause

There is a GPO to enable Alt CTRL+ALT+DELETE sequence for logging on after hibernation.

This is the reason that SSO is not working.

## Solution

This solution requires authentication. Please log in to view the full solution.

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