After searching through my archives, I finally found this message from Joel Rennich of afp548.com fame.
Since Googling for that error found pretty much nothing else on the net, I thought I’d throw it here so that someone else wondering about all the
auxpropfunc error -1
entries in your syslog and console logs were could have a clear, consise answer to the issue.
From: Joel Rennich
Subject: Re: auxpropfunc error -1
Date: Wed, 31 Mar 2004 08:35:55 -0500
This is a result of Cyrus trying to use the /usr/lib/sasl2/pwauxprop
SASL plugin. It appears that this plugin handles password policies such
as minimum length and whether the user has to have numbers in the
password or not. Use of this plugin requires reading in the password
server database in /var/db/authserver. When DirectoryServices calls
this plugin it’s running as root, so it can easily read the database
in. However, Cyrus runs as the cyrus user which has no ability to read
that file. As such the plugin fails. Since cyrus has no need to check
password policy, you don’t really have a way to change your pass
through Cyrus, this isn’t an issue.