I suffered with this for a while. I my case it was because a lookup against the AD root failed. I had to specify a container. Since I needed to look in different containers, a bit of "unlang" and Alan and Ivan's help fixed it.
Hope this helps,
Leighton 


From: freeradius-users-bounces+l.j.man=hud.ac.uk@lists.freeradius.org [mailto:freeradius-users-bounces+l.j.man=hud.ac.uk@lists.freeradius.org] On Behalf Of Alba
Sent: 01 July 2009 22:45
To: FreeRadius users mailing list
Subject: Fwd: rlm_ldap: ldap_search() failed: Operations error

> It's a magic LDAP && Active directory issue.

:-)

Thanks!


On Wed, Jul 1, 2009 at 3:15 PM, Alan DeKok <aland@deployingradius.com> wrote:
Alba wrote:
> Thanks Alan, I'll try it.
>
> Do you know the cause of this message? Is it a bug or a configuration issue?

 It's a magic LDAP && Active directory issue.

 Alan DeKok.
-
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