Update from Exchange 2013 Cu2 to SP1 - Outlook 2010 with SP2 clients disconnected

Hi,

we recently upgraded a standalone Exchange 2013 Server to SP1. Owa works fine, but all internal Outlook 2010 Clients (with SP2) get disconnected. Creating a new Profile, and testing the internal autodiscovery leeds to an Error 12030 (Connection reset) during the discovery process.

I already checked the Service Point, the discovery URLs, even recreated the autodiscover virtual Directory in iis. But nothing changed.

The self signed certificate, that was used before the update is further used, and well known to all Clients. As I tested, OWA is working well everywhere.

Anyone some new ideas?

Best regards
Bernhard