Thanx to Vitaly & the dev team I now managed to sync my N900 with my Scalix Groupware Server via Active Sync like a charm.

The reason for not being able to sync is obviously a misbehaviour either on the Scalix side (EAS 12.0/12.1 not being fully implemented) or on the MfE side. No matter which side actually causes the problem, Vitaly came up with a simple workaround to fix it!

I forced the N900 to only use EAS 2.5 no matter what the initial sync negotiation would come up with. If Vitaly agrees I would post a short howto here on the forum.

THX Vitaly. You made my day! Go have a beer on my tap tonite!