Crate an excel file for each individual Business Central Table in which you can couple multiple records and publish this changes without running a new sync between CRM and Business Central.
Category: Data Migrations
2021 Release Wave 2
Ideas Administrator

Thank you for your valuable feedback. We have decided to deliver this idea and make it available with Business Central 2021 release wave 2.  

You can now couple records between Business Central and Dataverse (and Dynamics 365 Sales) in bulk.

Learn more about what's new and planned for Couple records between Business Central and Dataverse (and apps for Dataverse) in bulk in the release plan here: https://docs.microsoft.com/en-us/dynamics365-release-plan/2021wave2/smb/dynamics365-business-central/couple-records-between-business-central-dataverse-apps-dataverse-bulk  

Your help was greatly appreciated,  
Business Central Team