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Are their mailbox size relatively the same? &nbsp;Are they in the same SG and Mailbox store?
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Are their mailbox size relatively the same?  Are they in the same SG and Mailbox store?

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For the directors we don't have size limits and all of them are in the same SG and Mailbox store.
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For the directors we don't have size limits and all of them are in the same SG and Mailbox store.

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I have and Exchange 2003 server running on a Windows 2003 server.<br />
I have several company directors involved in a very important project. Email sent from one of our lawyers to all the directors arrives on time for some of the directors, but it may late several hours for the others.<br />
All the directors are using Windows XP, with all the patches and Outlook 2003. as usual late email puts a director in a disadvantaged or dangerous position if all the others answer and he/she does not. <br />
I have a firewall and a filter appliance. We have checked the filter and there are no emails from the sender being held...and we know it arrived at some of the users inbox.<br />
Any assistance is welcomed.
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I have and Exchange 2003 server running on a Windows 2003 server.
I have several company directors involved in a very important project. Email sent from one of our lawyers to all the directors arrives on time for some of the directors, but it may late several hours for the others.
All the directors are using Windows XP, with all the patches and Outlook 2003. as usual late email puts a director in a disadvantaged or dangerous position if all the others answer and he/she does not. 
I have a firewall and a filter appliance. We have checked the filter and there are no emails from the sender being held...and we know it arrived at some of the users inbox.
Any assistance is welcomed.

same email arrives late for some users but arrives on time for others

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.