Automatic Provisioning: PATCH API endpoint to update user attributes doesn't work with manager field

Issue Summary

As per: How to sync the manager attribute into Atlas it is possible to configure Okta to sync the "manager" field value to a user's Atlassian account

The manager field value is only visible using reporting lines feature on Teams Central/Atlas and is not visible on the user's Atlassian account profile or in product(Jira/Confluence) contact card - ⚡️ Supercharge your project and goal reporting with your org structure

Only Okta is supported at the time of writing(10-Jun-2022), so admins may want to use the API endpoints to update user SCIM/provisioning records to include the "manager" field.

There are 2 supported request methods to update user SCIM record attributes:

• PUT: https://developer.atlassian.com/cloud/admin/user-provisioning/rest/api-group-users/#api-scim-directory-directoryid-users-userid-put
• PATCH: https://developer.atlassian.com/cloud/admin/user-provisioning/rest/api-group-users/#api-scim-directory-directoryid-users-userid-patch

Steps to Reproduce

Try sending a PATCH call to update the manager field. Example:

curl --request PATCH \
  --url 'https://api.atlassian.com/scim/directory/<dir_id>/Users/<user_scim_id>' \
  --header 'Authorization: Bearer <dir_API_token>' \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/json' \
  --data '{
  "schemas": [
    "urn:ietf:params:scim:api:messages:2.0:PatchOp"
  ],
  "operations": [
    {
      "op": "Add",
      "value":{
      "urn:ietf:params:scim:schemas:extension:enterprise:2.0:User":{
      "manager":{
                 "value":"manager_email_address@example.domain.com"
                }
        }
      }
    }
  ]
}'

Expected Results

The manager field in SCIM record is updated and the manager value appears in Atlas/reporting lines feature

Actual Results

The call runs without an error response - 200 response, but the manager field is not updated

Workaround

Use the PUT method instead of PATCH: https://developer.atlassian.com/cloud/admin/user-provisioning/rest/api-group-users/#api-scim-directory-directoryid-users-userid-put