I have 3 Apple ID's.
Some of my music will NOT play unless I supply my appleid for that library, but I have 3 different id's...CAN I USE ONLY 1 ID?
Windows, 10
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CAN I USE ONLY 1 ID?
The best is to have only one Apple ID.
You are sign in here . . . with your Apple ID & Password.
Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.
👉 You can’t merge multiple Apple ID accounts.
What happens when you use the same Apple ID & Password?
See the following Apple articles
Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support
Manage and use your Apple ID -> Manage and use your Apple ID – Apple Support (UK)