Family Sharing for Apple One

He should be able to do it with his ID. He should never use your ID.

Add a family member to your shared subscriptions - Apple Support

- You can share many subscriptions from Apple, like Apple TV+ and Apple Fitness+, with your family.

- "When you share subscriptions like Apple Music, Apple Fitness+, or Apple TV+, each person sees their own preferences and recommendations — not the whole family’s. And when you share an iCloud storage plan, family members can't see each others’ photos, files, or documents."

- How to add a family member to your subscription from Apple

1. Open the Settings app.

2. Tap your name, then tap Family Sharing.

3. Tap Set Up Your Family, then follow the onscreen instructions and invite your family members.

Already set up Family Sharing? If yes, use this shortcut to jump to the troubleshooting section of the article --> Add a family member to your shared subscriptions - Apple Support

4. Eligible subscriptions are automatically shared with your family members.

Here's a list of standard things to try when a feature is not working:

Make sure the software is up to date on all devices involved.

Update macOS on Mac - Apple Support

Update your iPhone or iPad - Apple Support

Sometimes it helps to have the devices involved take a fresh look at settings:

● If this is a service, try disabling it and turning it back on.

● Try signing out of accounts and back in again.

Sign out of iCloud on your iPhone, iPad, Apple TV, or Mac - Apple Support

Sign in with your Apple ID - Apple Support

If you have more than one Apple ID, don't forget you may be signed into other accounts too for special services such as iMessage and Media & Purchases.

● Restarting is a simple step that can resolve many unexpected behaviors.

iPhone: Restart your iPhone - Apple Support then choose your model.

iPad: Restart your iPad - Apple Support

Mac: Ways to start up your Mac - Apple Support

Try using other equipment if possible. I have seen several cases where somebody tried to do something on one item of equipment and failed, but then tried on a different item of equipment and succeeded.

Sometimes it can take some time for changes to propagate through the system and waiting may help ( e.g., Family Sharing of Apple News+ - Apple Community ). If a problem persists, particularly over several days, try contacting Apple for assistance:

Click here --> Choose your country or region - Official Apple Support Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

"See a list of Apple phone numbers around the world."

Click here --> Contact Apple for support and service - Apple Support