domain-españa.es domain (with the letter Ñ) needs to be transferred. But at the store the error "Invalid domain" appears.
When normalized domain is transferred:
xn--domain-espaa-2nb.es , the "Not available" error appears, while at the registrar (OpenProvider) the domain is available for transfer.
IDN records are disabled in OBAS.
The IDN records can be enabled in at
Top > Service Director > Domain Manager > Setup
Select the option:
"Allow customers to enter International Domain Names (IDN)"