If you have Sametime 8.5 installed and you intend to upgrade to the new 8.5.1 release, then you might be encountered with an error that will neither let you upgrade your meeting server and media management installation nor allow a new installation.

I wrote about the problem earlier in in this blog and it took me almost 3 days to figure out what is going on, so this tipp can save you a lot of time.

Both, meeting server and media manager are installed using a deployment plan that binds to an LDAP directory.

If you don’t have changed the person’s search and/ or authentication attributes in the the LDAP configuration in SSC, you will be able to do the upgrade or a clean install without problems.

But if you have changed the athentication attributes and added displayname to field for instance, then the installation or the upgrade will fail.

In 8.5.1 the field validation for the attributes obviously have changed.

You have to revert to the standard attribut settings to be able to successfully update your Sametime  8.5 installation.