iCloud User Guide
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Trouble signing in to iCloud.com
If you have trouble signing in to iCloud.com, try the following:
When typing your password, make sure the Caps Lock key isn’t on (passwords are case sensitive).
Make sure you’re entering the email address and password for the Apple ID you use with iCloud.
If you can’t remember your password, or you see a message that your account has been disabled for security reasons (which might happen if someone tried and failed to sign in multiple times), you need to change your password. See Change your Apple ID email, password, or profile picture.
Note: In some locations, you can use a phone number instead of an email address as your Apple ID.
If you set up your Apple ID to require two-factor authentication or two-step verification, make sure you correctly enter the latest code sent to your device.
If you sign in successfully and only see Contacts, iCloud Drive, Keynote, Notes, Numbers, and Pages, your account is limited to iCloud web-only features. (If you sign in from a web browser on iPhone or iPad, you see a subset of these features.) To see and use other iCloud features, see Get more iCloud features.
To turn on iCloud on your device, see Set up iCloud on all your devices.
If you’re still having trouble, see the Apple ID Support website or the iCloud Support website.