Dialplan
Lync Dialing Rule Optimizer
https://www.lyncoptimizer.com/
Configure the mediation server to ignore if gateway does not include the +
C:\Program Files\Microsoft Office Communications Server 2007 R2\Mediation Server\MediationServerSvc.exe.config
http://support.microsoft.com/kb/952785
<?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="RemovePlusFromRequestURI" value="Yes" /> </appSettings> </configuration>
For R2 please read the following article:
http://blogs.technet.com/b/ucspotting/archive/2009/02/28/removeplusfromrequesturi-or-how-to-make-ocs-non-rfc-3966-compliant.aspx