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Are your Outlook clients in cached mode? Check the sync issues folder to see if anything is failing to synch like the OAB 
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Are your Outlook clients in cached mode? Check the sync issues folder to see if anything is failing to synch like the OAB

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yes, all outlook are in cached mode, i do have proble with OAB on some client but not all.
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yes, all outlook are in cached mode, i do have proble with OAB on some client but not all.

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What OAB error are they getting?
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Hello,<br />
<br />
What all the third party applications have you installed on Server? Like ANti Virus....<br />
<br />
Set the proper exclusions for anti virus.. <br />
<br />
Check the eventvwr for more help... Also Disbaling cache and enabling the cache mode again. <br />
<br />
Regards,<br />
:)
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Hello,

What all the third party applications have you installed on Server? Like ANti Virus....

Set the proper exclusions for anti virus..

Check the eventvwr for more help... Also Disbaling cache and enabling the cache mode again.

Regards,
:)

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i create new SBS 2008 environment and migrate PST files from old SBS 2003 to new SBS 2008, after few days Everybody in our organization has been complaining about the balloon that pops up on the bottom right corner of Outlook 2003 that says, &quot;Outlook is trying to retrieve data from the Microsoft Exchange Server &quot;<br />
the SBS 2008 is a VM and has 2 CPU with 12 GIG of RAM, we only have 40 users
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i create new SBS 2008 environment and migrate PST files from old SBS 2003 to new SBS 2008, after few days Everybody in our organization has been complaining about the balloon that pops up on the bottom right corner of Outlook 2003 that says, "Outlook is trying to retrieve data from the Microsoft Exchange Server "
the SBS 2008 is a VM and has 2 CPU with 12 GIG of RAM, we only have 40 users

Outlook is trying to retrieve data from the Microsoft Exchange

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.