I would like how transfer my serial number to a people who I sell my a49 Midi, It hasn't been showed to me in "license transfer" window (on site)
If you have a problem with transfers of account then only N.I. Support(all) can help you.
In case that you need guidance contacting support : How to contact NI Support and How to get in touch with our Customer Care
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General information : Quote Matt_NI : All you need to know about License Transfer