Tries to merge given contact by ContactEmail. Moves subscriptions and copies contact's data. In the case the EMS license is available, moves activities, memberships, relations and copies contact's data. Given contact will be used as merge target, i.e. this particular ContactInfo will remain, while others with the same ContactEmail will be merged to the contact.

Merges given source contact to the target. Moves subscriptions and copies contact's data. In the case the EMS license is available, moves activities, memberships and relations.