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If you have a site to site VPN connection the normal one will work just fine. If you are publishing it to internet then use the http over ssl for users to connect. 
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If you have a site to site VPN connection the normal one will work just fine. If you are publishing it to internet then use the http over ssl for users to connect.

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OK can we go over the setup again ?<br />
<br />
You have 4 branches and only ONE exchange server in the HQ right ?<br />
<br />
what kind of connectivity do you have between your branches ? 
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OK can we go over the setup again ?

You have 4 branches and only ONE exchange server in the HQ right ?

what kind of connectivity do you have between your branches ?

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honestly both would do, since you have a domain controller in the branches then i take it you have some kind of vpn between them, in that case both would work
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honestly both would do, since you have a domain controller in the branches then i take it you have some kind of vpn between them, in that case both would work

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yes but it's a backup solution if i have a problem on vpn :) conection
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yes but it's a backup solution if i have a problem on vpn :) conection

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hello <br />
i have four brances woth one exchange server on the hq also i have aditional domain in exchange branch <br />
which is fine use rpc over http or use the normal connection between exchange and outlook?<br />
thanks.
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hello 
i have four brances woth one exchange server on the hq also i have aditional domain in exchange branch 
which is fine use rpc over http or use the normal connection between exchange and outlook?
thanks.

normal or rpc

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.

Outlook

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).