When you sign out of your Apple ID on an iPhone or Mac, several key services and data linked to your account are affected. First, iCloud services are disabled, which means features like iCloud Photos, iCloud Drive, Notes, Contacts, and iCloud Backup will stop syncing. Any locally stored data remains on the device unless you choose to delete it during the sign-out process. You'll also be signed out of other Apple services such as the App Store, Apple Music, iMessage, and FaceTime, and you’ll lose access to purchased content that’s tied to your Apple ID unless it's already downloaded. Read more - https://www.thepetservicesweb.com/board/board_topic/2635323/6838846.htm