Summary

When users with spaces in their usernames are sync'd into Confluence from an external directory (e.g. Active Directory), they are unable to reset their password due to the following error:

The following error(s) occurred: User with username 'FirstName' does not exist.

How to replicate

1. Set up a mail server with Confluence..
2. Sync a user directory containing a user whose username is in the following format: "FirstName LastName", whereby there is a space that separates the two names. For example, "Jonathan Soo".
3. Logout and click on "Forgot your password?" on the login page.
4. Enter your username or e-mail address into the field and click on "Send it to me".
5. Check your e-mail for an e-mail from Confluence and click on the "Reset Password" button in the e-mail.
6. Enter your new password twice and click on "Reset".

Expected results

The password should be successfully changed.

Actual results

We see the following error for the user "Jonathan Soo".