Slow access in Outlook from VPN using an Exchange 2007 mailbox

VPN from office is fine, but Exchange 2007 is very slow when I use VPN from home.   Exchange 2003 is ok.

newexc01pr is new Exchange 2007 server

ü       Using cache mode
ü       Defined newexc01pr and newexc01pr.na.tigplc.com in hosts file
ü       RDP access to newexc01pr is fine
ü       Pings are acceptable (Same as Exchange 2003 server)
 
Symptoms:

v      10 minutes until login prompt comes up
v      15 minutes for folders to show up to date in cache mode.  Cant access Outlook until completed.  I was successfully able to send message after Outlook came back.
v      15 minutes to download Offline Address book.
v      15 minutes to access 2003 public folder from Exchange 2007.

Any ideas, what I can look at?
Could we have a DNS issue for newexc01pr?
Authentication seems to work, but extremely slow
Look into RPC service on DCs?
Should we look into difference for firewall rules for adcnaex01 and newexc01pr?

Thanks
Ron White
rreywhite22Asked:
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rreywhite22Connect With a Mentor Author Commented:
I received a new notebook and tested it.   It worked fine on new notebook.   I noticed that the VPN client was newer and DNS servers were different.   There could have been an issue with prior VPN thread.

Ron White
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ProbityCommented:
What kind of bandwidth do you have at home and at the office?
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rreywhite22Author Commented:
I am not sure on the bandwidth for my ISP, but I remember upgrading it so it is better than the standard high speed..   I believe it is 3-4 Mbps.

We are in the process of migrating to Exchange 2007 and need to get VPN access to work before moving users.   Exchange 2003 works fine from VPN so I don't believe bandwidth would be an issue or we would see problems there too.   Both are on same subnet.

It seem that any task that requires taking to AD is slow.   Any ideas for what tools to run for troubleshooting in comparing the VPN at work and VPN at home?

Thanks.
Ron White
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