Financial clients in Korea gave feedback that it was difficult to use Adobe Analytics without IP restrictions. Could you please allow us to continue using this feature?

I don't think this can be done. Adobe does allow you to mix and match Identity types so you could use 'Federated ID' to manage your internal users and 'Adobe ID' to manage third parties. In which case you many want to restrict the level of access that those using the Adobe ID have. If your company uses something like Azure Active Directory, you may be able to use this to allow authentication on to devices not on your corporate network. This wouldn't be locked to an IP address range but could enf...