Exchange 2010 install error

I got the following error below when trying to install Exchange 2010 Mailbox role.

Mailbox Role
Failed
Error:
The following error was generated when "$error.Clear(); $arbUsers = @(get-user -Filter {lastname -eq "MSExchApproval 1f05a927-3be2-4fb9-aa03-b59fe3b56f4c"} -IgnoreDefaultScope -ResultSize 1); if ($arbUsers.Length -ne 0) { $mbxname = $arbUsers[0].name; $mbxs = @( get-mailbox -arbitration -Filter {name -eq $mbxname} -IgnoreDefaultScope -resultSize 1 ); if ( $mbxs.length -eq 0) { $dbs = @(get-MailboxDatabase -Server:$RoleFqdnOrName -DomainController $RoleDomainController); if ($dbs.Length -ne 0) { enable-mailbox -Arbitration -identity $arbUsers[0] -database $dbs[0].Identity; } } }" was run: "The LdapRecipientFilter "(&mailnickname=*) " on Address List or Email Address Policy "New recipient policy" is invalid. Additional information: The attribute type '&mailnickname' or its syntax is not defined in the schema.".

The LdapRecipientFilter "(&mailnickname=*) " on Address List or Email Address Policy "New recipient policy" is invalid. Additional information: The attribute type '&mailnickname' or its syntax is not defined in the schema.

The attribute type '&mailnickname' or its syntax is not defined in the schema.

Any help anyone can give to get past this error would be great.