The requested improvements are below:
1. Allow the option to provision a phone number back from RC to Azure AD via SCIM in case of a new created user. This option should be allowed per admin to enable/disable write back to Azure AD.
2. Provision/sync a user from Azure AD to RC with an already assigned phone number in Azure AD – meaning this number in AD is leading and shall be assigned to the User on RC side
3. Allow to provision/sync extension numbers from Azure AD to RC – meaning open the extension attribute on RC side to edit.