> Source: [sk169955](https://support.checkpoint.com/results/sk/sk169955)

# sk169955 - Unable to authenticate in Preboot login after adding a list of users to Authorized Preboot users list

| Property | Value |
|----------|-------|
| Solution ID | sk169955 |
| Date Created | 2020-10-26 |
| Last Modified | 2020-11-02 |
| Technical Level | Advanced |
| Products | Security Management Server, Endpoint Security |
| Versions | R82.10, R82, R81.20, Cloud, R82.20, E89.X, E88.X |
| OS | Gaia |

## Symptoms

- * Unable to authenticate in Preboot login after adding a list of users to Authorized Preboot users list.
* **$UEPMDIR/logs/Server_messages.log:**   

  Failed to get FDE user info. PayloadType: GET_FDE_USER_INFO, EPGUID: xxxxxxxxxxx, authInfo: AuthenticationInfo(endpointFqdn: "xxxxxxxxxx", isEndpointAuthenticated: false, userFqdn: "xxxxxxxxxxx", isUserAuthenticated: false) (Endpoint /xx.xx.xx.xx)  
  Caused by: java.lang.NullPointerException  
  at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1022)  
  at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1017)  
  at com.checkpoint.uepm.backend.is.commands.genericcommands.GetBeanByIdCommand.executeSpecificGet(GetBeanByIdCommand.java:83)  
  at com.checkpoint.uepm.backend.is.commands.GetCommand.execute(GetCommand.java:72)

## Cause

When the user tries to get authorized in Preboot mode by a local or domain user, a 'Null Pointer Exception' is generated in the server logs. These additional users (local and domain) were added to the Preboot list, but information about these users does not exist in the DB. That is why sync requests are rejected by the server.

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## Solution

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