Settings - Global data & merging
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 Global data  | 
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 Allow global contacts  | 
 Enables the use of global contacts on the website.  | 
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 Automatically create global contact for user  | 
 If enabled, the system creates new global contacts when it detects that there are multiple contacts associated with a user registered on multiple websites in the system. 
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 Automatically create global contact for visitors with identical e-mail addresses  | 
 If there are users with the same e-mail address across multiple websites, the system creates a global contact for all site contacts associated with the given user.  | 
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 When choosing from global contacts, select  | 
 Indicates which contact the system uses as the primary contact for site visitors who have multiple global contacts assigned. The following options are available: 
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 Allow global accounts  | 
 Enables the use of global accounts on the website.  | 
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 Allow global contact groups  | 
 Enables the use of global contact groups on the website.  | 
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 Allow global configuration  | 
 Enables the use of global contact statuses, account statuses and contact roles on the website.  | 
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 Automatic merging of contacts  | 
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 Merge contacts for identical E‑commerce customers  | 
 If enabled, the system automatically merges contacts that are associated with the same e-commerce customer.  | 
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 Merge contacts for identical Newsletter subscribers  | 
 If enabled, the system automatically merges contacts that are associated with the same newsletter subscriber.  | 
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 Merge contacts with identical e-mail addresses  | 
 If enabled, the system automatically merges contacts that have the same e-mail address.  | 
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 When a visitor has more contacts, use  | 
 Determines which contact the system selects as the parent when automatically merging: 
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Note: The system always automatically merges contacts that are associated with the same user account.