We setup IDM 14.4 on new Weblogic 12c R2 servers, while connecting to the same old db instance running on MS SQL server.
Is this a supported upgrade path?
You would not install fresh on the new machine with 14.4 and point to the old database. This would not work as IGA does not see the old DB and automatically upgrade it.
Please see the upgrade scripts located in C:\Program Files (x86)\CA\Identity Manager\IAM Suite\Identity Manager\tools\db
The scripts should be used to upgrade your database to 14.4. Once upgrade, you can not use 14.2 against the 14.4 DB.