https://docs.whmcs.com/8-10/addon-modules/importassist/
ImportAssist - WHMCS
ImportAssist migrates data from external systems into WHMCS. It can migrate data from other WHMCS instances or from other applications.
whmcs
https://docs.whmcs.com/8-0-9/addon-modules/importassist/
ImportAssist - WHMCS
ImportAssist migrates data from external systems into WHMCS. It can migrate data from other WHMCS instances or from other applications.
whmcs
https://docs.whmcs.com/8-0-9/troubleshooting/troubleshoot-addon-modules/importassist/importassist-unable-to-connect-errors/
ImportAssist Unable to Connect - WHMCS
Troubleshoot and resolve Unable to Connect errors while using the ImportAssist addon module.
unable to connectwhmcs
https://marketplace.whmcs.com/product/46-importassist
ImportAssist - WHMCS Marketplace
Make the Switch to WHMCS in Minutes
whmcsmarketplace