changelog/10.5.0_2020-07-31/37424-2
Bugfix: Allow clearing a user email address with the Provisioning API
Specifying the empty string as the email address is now valid when editing a
user with the Provisioning API. This allows the email address of a user to be
cleared.
https://github.com/owncloud/core/issues/37424
https://github.com/owncloud/core/pull/37427