I had linked my Apple ID to a now deleted Dropbox account and I can't use it to create a new one.

I’ve contacted Dropbox Enhanced Support via email, as well as Apple Support. It seems there might be a potential bug in Dropbox’s authentication system. Dropbox Enhanced Support has kindly forwarded this issue to their engineering team and recommended that I also share my feedback here.

Description:

I've encountered an issue when using "Sign in with Apple" to create or log in to Dropbox accounts. Specifically, once a Dropbox account linked with an Apple account is deleted, the same Apple account becomes permanently unusable for signing into Dropbox—even if using a different email address provided by Apple's "Hide My Email" feature.

According to the [Apple Developer Documentation](https://developer.apple.com/documentation/signinwithapple), "Sign in with Apple" utilizes a unique, stable identifier (user identifier) rather than an email address for authentication purposes. This identifier is:

• Unique and consistent across all apps within the same Apple Developer team
• Persistent, meaning it doesn't change if the user temporarily stops using Sign in with Apple
• Intended as the primary user identifier instead of the email address

Given this information, it appears that Dropbox's system might still be associating this permanent Apple account identifier with previously deleted ("dead") Dropbox accounts. Consequently, users cannot reuse their Apple account to access Dropbox again, even with entirely different email addresses.

Impact: This issue significantly affects users who might want to delete and recreate their Dropbox accounts using Sign in with Apple. After account deletion, their Apple ID becomes permanently blocked from future Dropbox account creation or login.

I've reproduced this behavior using different Apple accounts, confirming it's not an isolated incident.

Request: Please investigate and address this issue, as it could widely impact user experience and account accessibility.

Thank you!