Before merging accounts, it is VERY IMPORTANT that you are aware of the consequences:
The services associated with account A will cease to be active, and the account will be deleted. Obviously, access to the Web console of account A will be denied.
The Web console of account B will display data and information about the computers managed from account A. To check this, just access the Web console of account B.
The protection installed on computers managed from account A will be reassigned automatically, and will be manageable from account B. It will not be necessary to reinstall the protection.
Note: The process of transferring data is not immediate, and so it will take time before you can check this has been successful in the Web console of account B.
In the event of an error, refer to the Possible errors when merging accounts section.