We are experiencing several problems with a few WAN links. People placed on those offices are reporting issues about slow Internet navigation, slow file transfers and even they are using OWA because it's totally impossible to use Outlook 2003 as they always get an error saying that The Exchange Server isn't avalibale. They're experiencing specially with Outlook and Exchange Server.
My question is that what are the requirements for Exchnage or the Global Catalog, Do we need a minimun response time to work with Exchnage?.
The number of workers on those offices goes from 7 to 20. There aren't no DNS servers nor Domain Controllers placed on those offices.
If I go to the File Server Event Viewer of one server placed in one office, I see several netlogon errors reporting a failure detenting a Domain Controller.