BES Problems - MSExchangeSA

BES Stopped sending emails to all blackberry devices at approx 1am this morning.

Exchange Server was restarted as well as BES (all services)

No apparent events in eventviewer - but this:

After restarting the Global Catalog Server - the blackberry server started to work.
Lesson: Don't just look at eventlog relating to the problem but look at a wider scope.

Further Information - What is NSPI and how does it work?

NSPI - Name Service Provider Interface