If I have more than 1 CDS account, how many times do I need to register as a user of Share Registry and IPO (MY)?

You only need to register once as a user of Share Registry and IPO (MY), even if you have multiple CDS accounts.

Once your user registration is approved, you will be able to view and manage all your eligible CDS accounts under the same registered email address, provided they are under your name and MyKad/Passport number.