Establish whether Sky activation has already happened
Check whether the household has an existing activated HBO Max account associated with the Sky arrangement. The official guide says activation is needed once; afterwards the HBO Max account signs in on supported devices. Do not repeat activation as the first response to every unsuccessful sign-in on a different screen.
If the earlier account information has not carried over, begin with the current official activation instructions from the Sky device. Keep the intended account email consistent and private. Before creating anything, establish whether someone else in the household has already completed the link so that two similar addresses do not confuse the enquiry.
Separate sports access from the entertainment app
Retain which app contains the material being sought. The publisher specifically says discovery+ entertainment continues in discovery+, while TNT Sports access continues through HBO Max. The migration therefore does not imply that every old programme and subscription function has moved into a single identical interface.
For an illustrative comparison, write two entries in the household note: the sport being sought in HBO Max and the entertainment title being sought in discovery+. Record the actual messages independently. This prevents a working entertainment session from being used as proof that the Sky-to-HBO Max activation must already be complete.
Use the activated account on another supported device
After activation, HBO Max directs viewers to use its account email and password on other supported devices. That differs from assuming that the Sky account password itself signs into every application. Check the account identity before resetting a password belonging to the wrong service or starting another subscription on the second device.
For a remaining issue, report Sky as the supplying provider, whether activation completed, the HBO Max account identity through private support and the exact access message. Describe an entertainment-app question separately. Those details let support investigate the link or content route without losing the distinction between the provider relationship and the streaming account.
Questions about this guide
Must a Sky subscriber activate HBO Max again on every supported device?
The help says activation is required once; use the activated HBO Max account to sign in on other supported devices.