I have a client that has 1 SBS 2008 server and approx 12 client PC's. mostly XP OS, and 3 Win 7 boxes, all AD, Exchange 2007, Sharepoint, standard SBS 2008 Server setup.
Server IS doing DHCP and DNS, as well as other roles. Linksys Router WGRT52, Netgear 16 port switch, internet via cat-5 cable coming from TW Telecom Adtran device, (all is 100% with this box from the tech. All ok with all users until a day or so ago, all of a sudden, 8 users got limited connectivity on their internet connection, No Outlook, NO internet, (all they normally do, and access to 2 share drives). Server, and another user connected to another 5 port switch working just fine, Server line is plugged into router, another 2 users connected same way, NO IP, limited connection, no internet, etc. Also 2 other sets of 2 users, connected by switch then connected to main switch (basically have 4 2 user PC offices connected to local 5 port switch, then connected back to main switch)
Checked ALL server services, rebooted several times, users still won't come up. REPLACED both main switch and Router with NEW equipment, and configured Router with Static IP info. All Cat-5 lines plugged directly to Switch, then router plugged to switch main port/autosensing port. If I connect the Cat-5 line directly to Router via internal 4 port switch, some of the 6 stations work, get IP's, get internet and Outlook, if I plug back to switch, it looses the IP and gets limited connection. Happens with existing Switch and router or replacement NEW equipment. If I take my outside domain laptop and plug into the switch directly, i cannot get an IP either, limited connection. If I go straight to router port, I can get online
All 3 5 port switches either fairly new, or I use my laptop connected to main Cat-5 line (bypassing switch) and I get Limited Connectivity, NO IP, no Internet, etc
I'm at my wits end ! all new hardware, ISP internet box 100%, ALL services running on Server..
All I see in the Event logs are DistributedCOm errors, but I do not know what they are.
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
to the user NT AUTHORITY\NETWORK SERVICE SID (S-1-5-20) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.
ALL help is most appreaciated, I have looked at this for many hours now, and the Client is frustrated..