Cannot login to Plesk via WHMCS: Customer with external id 'whmcs_plesk_XX' is not found in panel

Symptoms

1. Migration from Plesk 12 to Plesk Onyx was performed.

2. WHMCS is used on the server.

3. The following error is shown when accessing user with login 'example' in Plesk via WHMCS:

PLESK_INFO: Error code: 1013. Error message: Customer with external id 'whmcs_plesk_XX' is not found in panel.

4. External_id is missing for the user with login 'example':

MYSQL_WIN: mysql> select external_id from client where login='example';
Empty set (0.00 sec)

Cause

This is caused by the Plesk Migrator bug #PMT-3035 which is planned be fixed in future updates.

Resolution

As a workaround, update external_id via command line:

1. Login to the server over RDP

2. Copy sample configuration file from the %plesk_dir%\admin\plib\modules\panel-migrator\backend\conf\samples\plesk-windows.ini file to the <PLESK_DATA_DIRECTORY>\var\modules\panel-migrator\conf\ directory. To find $PLESK_DATA_DIRECTORY location on the server use the following command:

   C:\> reg query "HKLM\SOFTWARE\Plesk\PSA Config\Config" /v PRODUCT_DATA_D /reg:32

3. Rename plesk-windows.ini to config.ini

4. Specify IP addresses of source and target server and their credentials in config.ini file, for example:

   CONFIG_TEXT: [plesk]
   ; An IPv4 address of the target Plesk server.
   ip: 203.0.113.200
   ; Panel administrator's login. If not specified, 'admin' is used.
   ; panel-username: admin
   ; Panel administrator password. If not specified, it is automatically detected.
   panel-password: required_password
   [pfw]
   ; An IP v4 address of this source Plesk server.
   ip: 203.0.113.300
   ; Panel administrator user name. If not specified, 'admin' is used.
   ; panel-username: admin
   ; Panel administrator password. If not specified, it is automatically detected.
   panel-password: required_password
   ; User name of the privileged system user on this Plesk server. Default is 'Administrator'.
   ; windows-username: Administrator
   ; Password of the privileged system user on this Plesk server.
   windows-password: required_password

5. Generate the migration list:

   C:\> "%plesk_dir%\admin\plib\modules\panel-migrator\backend\plesk-migrator.bat" generate-migration-list

6. Update external_id on the source server:

   C:\> "%plesk_dir%\admin\plib\modules\panel-migrator\backend\plesk-migrator.bat" set-external-id