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What if the exchange servers are in the same Domain but different Forest? &nbsp;For instance both units login into 123 however our Exchange Servers are named TwoC and ThreeC. &nbsp;I can't see the users nor can they see me. &nbsp;However, if I have an account on both Two and ThreeC could I setup Outlook thru the ThreeCs proxy server and my mailbox on that server?
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What if the exchange servers are in the same Domain but different Forest?  For instance both units login into 123 however our Exchange Servers are named TwoC and ThreeC.  I can't see the users nor can they see me.  However, if I have an account on both Two and ThreeC could I setup Outlook thru the ThreeCs proxy server and my mailbox on that server?

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We had to open the firewall for two way trust
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We had to open the firewall for two way trust

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How do you open another user's calendar in a different domain? &nbsp;i see the user in our gal but when I add their account to the mailbox and give them permissions, they receive unable to open folders?<br />
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The firewall has been open
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How do you open another user's calendar in a different domain?  i see the user in our gal but when I add their account to the mailbox and give them permissions, they receive unable to open folders?

The firewall has been open

Microsoft Exchange 2003 Opening another user's calendar in Different domain

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.