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On the 2003 server, you might have permission inheritance blocked, and the 2003 server may not have gotten the information it needs to grant the access to move the mailbox.<br />
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Right-click the Server object in Exchange System Manager on the 2003 server, go to Properties, Security, Advanced, and see if the inheritance checkbox is enabled.
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On the 2003 server, you might have permission inheritance blocked, and the 2003 server may not have gotten the information it needs to grant the access to move the mailbox.

Right-click the Server object in Exchange System Manager on the 2003 server, go to Properties, Security, Advanced, and see if the inheritance checkbox is enabled.

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Alternatively, you might try creating an administrative account that is not the built-in administrator, as that account is blocked from performing certain mailbox-related tasks.
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Alternatively, you might try creating an administrative account that is not the built-in administrator, as that account is blocked from performing certain mailbox-related tasks.

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If I go to go to Properties, Security, Advanced, the inheritance checkbox is enabled. &nbsp;Should I uncheck this? &nbsp;If so will it mess anything up?
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If I go to go to Properties, Security, Advanced, the inheritance checkbox is enabled.  Should I uncheck this?  If so will it mess anything up?

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I am migrating from exchange 2003 to exchange 2010. &nbsp;I moved all mailboxes but one which give me a &quot;insufficient user access rights&quot; error. &nbsp;I am logged in as administrator, but it seems like it doesn't have access to the mailbox I am trying to move. &nbsp;Any ideas?
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I am migrating from exchange 2003 to exchange 2010.  I moved all mailboxes but one which give me a "insufficient user access rights" error.  I am logged in as administrator, but it seems like it doesn't have access to the mailbox I am trying to move.  Any ideas?

When I try to move a certain mailbox from exhange 2003 to exchange 2010, it tells me I have &quot;insufficient user access rights&quot;

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

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

When I try to move a certain mailbox from exhange 2003 to exchange 2010, it tells me I have &quot;insufficient user access rights&quot;

When I try to move a certain mailbox from exhange 2003 to exchange 2010, it tells me I have "insufficient user access rights"