The header of every page in your store extends an invitation for shoppers to Log in or register for an account with your store. Customers who open an account enjoy a range of benefits, including:
Customers can access their account by clicking the My Account link in the header of the store. From their account, customers can view and modify information, including past and current addresses, billing and shipping preferences, newsletter subscriptions, wishlist, and more.
The scope of customer accounts can be limited to the website where the account was created, or shared with all websites and stores in the store hierarchy.
If the website is excluded from the customer group, the customer is not allowed to log in to the website when the scope of customer accounts is limited to the website or shared with all websites. See Create a customer group for more information about excluding websites from groups.
On the Admin sidebar, go to Stores > Settings > Configuration.
In the left panel, expand Customers and choose Customer Configuration.
Expand the Account Sharing Options section.
Set Share Customer Accounts to one of the following:
||Shares customer account information with every website and store in the installation.|
||Limits customer account information to the website where the account was created.|
If necessary, clear the User system value checkbox to make the change.
When complete, click Save Config.
Global is selected the customer information in My Account (addresses and account information such as contact details) is shared.