IBUK--> IBIRE Transfers und was u.a. beim transfer nicht von IB gemacht wird, ist via link nachzulesen.
https://ibkr.info/tag/account-mgmt
z.B. Orders:
10. Will open orders (e.g., Good-til-Canceled) be carried over when my account is migrated?
Open orders will be not carried over to the new account and we recommend that clients review their orders immediately following the migration to ensure that the open orders are consistent with their trading intentions.
....
https://ibkr.info/tag/account-mgmt
z.B. Orders:
10. Will open orders (e.g., Good-til-Canceled) be carried over when my account is migrated?
Open orders will be not carried over to the new account and we recommend that clients review their orders immediately following the migration to ensure that the open orders are consistent with their trading intentions.
....