FortiGate goes into conserve mode due to high memory usage of WAD user-info process. The WAD user-info process will query the user count information from the LDAP server every 24 hours. If any of the LDAP query messages are closed by exceptions, there is a memory leak. If obtain-user-info is enabled under config user ldap, this memory leak will be triggered on daily basis.Workaround: create an automation stitch to restart the WAD daemon every day to avoid conserve mode.