> Source: [sk165893](https://support.checkpoint.com/results/sk/sk165893)

# sk165893 - Endpoint Security Client fails to register to Endpoint Security Server

| Property | Value |
|----------|-------|
| Solution ID | sk165893 |
| Date Created | 2020-03-20 |
| Last Modified | 2020-03-24 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |

## Symptoms

- * Endpoint Security Client fails to register to Endpoint Security Server.
* Endpoint Security Client is disconnected from Endpoint Security Server.
* Error in *C:\\Program Files (x86)\\CheckPoint\\Endpoint Security\\Endpoint Common\\Logs\\cpda.log* :  
  \[DATE TIME\] root \[debug \] **SID found using DNS Host name: SRV00DOMAIN$**, SID: S-1-5-21-9122744-1349063169-1116685130-241562 \[g_getCompSID_ignoreDomainErrors\]
* Error in *C:\\Program Files (x86)\\CheckPoint\\Endpoint Security\\Endpoint Common\\Logs\\cpda.log* :  
  \[DATE TIME\] root \[error \] **Unexpected HTTP response code: 500** \[CHTTPCall_curl::sendReq_internal\]
* Error in *$UEPMDIR/logs/server_messages.log* :  
  `[DATE TIME] ERROR Dispatcher-Thread-9 - A server exception occurred while handling an endpoint request. Request size: 368, scheme: http, port: 8090, uri: /cp/connectionPoint/regep, ip: /XX.XX.XX.XX:XXXXX, opType: REGISTER_ENDPOINT, useZpdoc: false (ConnectionPointServlet)
  com.checkpoint.uepm.connectionpoint.ConnectionPointException: TICKET_NUMBER = XXXXXXXX. com.checkpoint.uepm.UEPMException: BLMConnector failed to process payload REGISTER_ENDPOINT for Endpoint /XX.XX.XX.XX`  
  `
  at com.checkpoint.uepm.connectionpoint.ServletUtils.handleException(ServletUtils.java:92)
  ...`  
  `
  Caused by: com.checkpoint.uepm.api.epsbackend.is.EpsBackendException: 
  TICKET_NUMBER = XXXXXXXX.`  
  ` 
  `**The endpoint domain name cannot be empty. FQDN: SRV00DOMAIN** `, SID: S-1-5-21-9122744-1349063169-1116685130-241562`  
  `
  at com.checkpoint.uepm.backend.common.responder.UsmRegisterEndpointResponder.verifyParameters(UsmRegisterEndpointResponder.java:495)`  
  `
  at com.checkpoint.uepm.backend.common.responder.UsmRegisterEndpointResponder.registerEndpoint(UsmRegisterEndpointResponder.java:231)`  
  `
  at com.checkpoint.uepm.backend.common.responder.UsmRegisterEndpointResponder.processClientPayload(UsmRegisterEndpointResponder.java:170)`  
  `
  at com.checkpoint.uepm.backend.common.responder.UsmRegisterEndpointResponder.processClientPayload(UsmRegisterEndpointResponder.java:104)`  
  `
  at com.checkpoint.uepm.connectionpoint.blmconnector.local.BLMConnectorLocalBinding.processClientPayload(BLMConnectorLocalBinding.java:259)`  
  `
  at com.checkpoint.uepm.connectionpoint.blmconnector.BLMConnectorUSM.processClientPayload(BLMConnectorUSM.java:194)`  
  `
  at com.checkpoint.uepm.connectionpoint.handler.RegisterEndpointHandler.handleRequest(RegisterEndpointHandler.java:58)`  
  `
  ... 24 more
  `
* DNS Suffix of the domain computer is empty.  
  ![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk165893/sk20200320173840.png)

## Cause

DNS Suffix of the domain computer is empty.  

The machine is not properly joined to the domain.

<br />

## Solution

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