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For the sake of reporting holdings to SEB we need to store what is called the sender id on the fund company. To do this we navigate to the fund company and click on Details.
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From the Details view, we find the Action menu and click on Edit Custom Fields.
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It is important with the right capitalization of the characters as well since this is case sensitive.
As the Value, we enter what the bank, in this case, SEB, has assigned to us.
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This is it for the Fund Company and we are all set!