A lot of those who upgrade to the multi-account are long-time users with several single profiles on Lnk.Bio.

Starting today we make it much easier for you to migrate your existing profiles into a newly-created multi-account.

From your Multi-account, head over to Menu > Agency > Settings to copy your unique migration code.

Then log in to each individual account you want to migrate, head over to Menu > Settings and add your previously copied migration code. Confirm and voilà! The account has been migrated!

Here's a full guide if you need more step-by-step instructions.