Hi ​@KCarlson, welcome to the Box Community!

The error message you're seeing means that the user you're trying to invite already has a personal Box account associated with that email address.
 

To add this user to your enterprise, please follow the steps below:

1. After receiving the initial error message “1 user failed to be added,” you can ignore it and click the Save button again. Saving a second time will initiate the invitation process.

2. An email invitation will be sent to the user, along with a notification in their Box account indicating they’ve been invited to join your enterprise account.

3. Once the user accepts the invite, they will be rolled into the enterprise.

For more details, you can refer to this support article:

“1 user failed to be added” Message When Adding Managed User

Looking forward to great results!

Hi, I’m having the same issue. I can’t try the above solution because after clicking save once, and the error appears, the save button becomes grayed out and is stuck out loading. I have been waiting for over 20 min, it is just stuck like that

Hi ​@nd1520, welcome to the Box Community! Sorry to hear you’re encountering an issue adding the user.

If the page is loading for some reason, we’ll need to check the network, browser, or other factors that may be causing the issue. Let’s try some troubleshooting steps here if you haven’t already done so on your end:

1. Log out and log back into Box, then try adding the user again.

2. Clear the browser's cache.

3. Try using an Incognito window, a different browser, or a different device.

4. Ensure your web browser is up-to-date (Internet Explorer, Safari, Firefox, or Chrome).

5. Verify that you’re using one of our recommended operating systems.

6. Disable all plugins, add-ons, or extensions within the browser.

Typically, web issues can be resolved by trying the steps above. However, if the issue persists, we will escalate it to our Product Support team for further assistance.
 

Thanks, and I look forward to sorting this out.