outlook 2010 disconnects from Exchange

Good Morning,
We are picking up intermittent problems with Outlook 2010 and 2007 disconnecting from Exchange server.
Most of the users that experience this problem is connecting via RPC over HTTP. Certificates installed OK, successfully connected and sent and received.
A contributing factor may be my LAN; different depts use different DG's (so bandwidth can be billed per dept). When working from pure internet connectivity, all seems OK, i.e. no disconnections, however when on the office LAN we pick up slow response and disconnections.

Any ideas as to where to look?

Thanks
Ian
IanGPAsked:
Who is Participating?
 
gaurav05Commented:
Hi,

check nslookup mail.domain.com

did you  get the ip address ?

try to ping that ip address ?

tracert your mail server ?

is your route  is correct ?

Let us know.
-Gaurav


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Gaurav SinghSolution ArchitectCommented:
Please diagnose your local network for any issues, Check your switches routers. the issue is lying with in your local network.
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Swapnil PrajapatiSr. System AdministratorCommented:
remove RPC over HTTP.
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IanGPAuthor Commented:
Thanks All:

check nslookup mail.domain.com
did you  get the ip address ? Yes
try to ping that ip address ? Times out
tracert your mail server ? Tracert hits the correct DG but never reaches the server
is your route  is correct ? Found undocumented changes on the router, static routes on machines so that routing is correct.

Please diagnose your local network for any issues, Check your switches routers. the issue is lying with in your local network. Done and most users are working fine.

remove RPC over HTTP. Can't do this as many of the staff are mobile

So current status:
Setting static routes on PC's has sorted out routing and connection. Will monitor for further disconnections.
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IanGPAuthor Commented:
Did not address and connection issues related to RPC over HTTP.
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