Help figuring out what is causing this log entry

To: debian-user@lists.debian.org
Subject: Help figuring out what is causing this log entry
From: Kelvin Jones <k.jones@printwest.com>
Date: Mon, 7 Jan 2019 14:42:48 -0600
Message-id: <[🔎] C3A3CD0D-8A2E-4879-9F5F-524F633F7970@printwest.com>

My syslog is being filled up with 

Jan  7 00:10:06 magpie slapd[9168]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16
Jan  7 00:10:06 magpie slapd[9168]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16
Jan  7 00:10:06 magpie slapd[9168]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16
Jan  7 00:10:06 magpie slapd[9168]: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16

What is causing this? I have googled this log entry a number of times but have found no solution. We are running Debian nine.

Thanks,

Kelvin Jones

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