slow accessing e-mail within outlook 2007

We have a single windows 2011 small business server, running exchange, and 5 clients running windows v7, 64 bit pro with Outlook 2007.

We find that when we access any of our items or folders within outlook, we get the revolving icon, and it can take between 2 to 3 minutes to open. Every now an then it seems to work fine, but generally it takes several minutes to display the required data.

We are also running AVG and Malwarebytes on eac workstation.

Restarting the server and the clients does not help.

Can anyone advise how we go about troubleshooting and resolving this very frustrating issue??

Many thanks
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Chris HInfrastructure ManagerCommented:
If you install outlook on the SBS server, how is the outlook performance?  

This can help point a finger at slow database or slow network/workstations.
nigelbeatsonAuthor Commented:
I am reluctant to install any office products on our server. Are you sure that will be OK??
Chris HInfrastructure ManagerCommented:

Since exchange 2007, it's been safe.  Office is pretty tried in true.  However, I can appreciate your skepticism.
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Larry Struckmeyer MVPCommented:
Can you confirm that the IP of the SBS server is the ONLY one listed anywhere in the network for "dns server".  Check with ipconfig /all in a cmd prompt.

Is any other network resource slow?  File access, print, quickbooks perhaps?
nigelbeatsonAuthor Commented:
I will check the DNS, but other resources all seem to work fine.

Have you started outlook in safe mode?
From run prompt: outlook.exe /safe
That will disable all add-in's.  See how long it takes to load.  If it pops up instantly, you have a definite problem with an add-in.  I've seen itunes plugin bork more outlook 2007 versions than anything else.
Chris HInfrastructure ManagerCommented:
Any word on the local installation of outlook?  How's performance when accessed directly on the server?

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nigelbeatsonAuthor Commented:
sorry for the delay in updating. the site in question is 1/2 an hours drive away, and I am trying to get there. will keep you posted with feedback once visited.

many thanks
nigelbeatsonAuthor Commented:
When running in safe mode, it did speed up slightly, enough for me to investigate the structure of the mailbox.

I found that there were thousands of e-mails in folders and subfolders which when syncing caused the delay in response. As soon as I moved most of them to a local archive folder, the whole thing came back to life.

Many thanks to all.
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