@Retired_mod was looking for below scenario https://docs.gcp.databricks.com/en/connect/storage/amazon-s3.html

here buckets are configured with Access keys as mounts, now workspace configured with UC and UC won't recommend to use DBFS mounts, we need to convert them as storages. where as in storage we have only IAM role option (Instance profile) , but there is no option to specify aws access keys to create storage credentials. within article no where it was mentioned as Depreciated. 

we are looking for article where it specifies above scenarios are not supported, some thing like that. This is blocking us to proceed with UC upgrade. please help to resolve this