We are currently trying to deploy Exchange 2010 on our network. We have run into some problems along the way because in the past someone had installed Exchange 2003 and 2000 but then removed the servers from the network...not sure why. We actually had to open a case with Microsoft support so they could go in and clean up the AD with ADSI edit so that Exchange 2010 would install properly. Now that we have 2010 installed I am seeing that a few of our users have legacy mailbox attributes associated with them. I have tried several methods to remove those mailbox's but it always comes back and tells me that I don't have permission to do so. I even found an article that described moving them to another mailbox database and then removing that database but that didn't work either. It seems that since Exchange can't contact the old database where those attributes actually reside I'm stuck and can't remove them. Short of removing the user accounts and re adding them to AD I am wondering if there is another solution to this issue. Can those attributes be removed using ADSI edit just as the old Exchange attributes were earlier? Any help or guidance would be much appreciated.

Here are the attributes you would need to clear/set to null on a user account. http://msexchangeteam.com/archive/2006/10/13/429192.aspx Remove Exchange Attributes vs. Delete Mailbox Remove Exchange Attributes removes the following attributes as long as they actually exist as available attributes of that schema object: adminDisplayName altRecipient authOrig autoReplyMessage (ILS Settings) deletedItemFlags delivContLength deliverAndRedirect displayNamePrintable dLMemDefault dLMemRejectPerms dLMemSubmitPerms extensionAttribute1 extensionAttribute10 extensionAttribute11 extensionAttribute12 extensionAttribute13 extensionAttribute14 extensionAttribute15 extensionAttribute2 extensionAttribute3 extensionAttribute4 extensionAttribute5 extensionAttribute6 extensionAttribute7 extensionAttribute8 extensionAttribute9 folderPathname (Outlook Web Access Server) garbageCollPeriod homeMDB (Exchange Mailbox Store) homeMTA internetEncoding legacyExchangeDN mail (E-Mail Address) mailNickname (Alias) mAPIRecipient mDBOverHardQuotaLimit mDBOverQuotaLimit mDBStorageQuota mDBUseDefaults msExchADCGlobalNames msExchControllingZone msExchExpansionServerName msExchFBURL msExchHideFromAddressLists msExchHomeServerName (Exchange Home Server) msExchMailboxGuid msExchMailboxSecurityDescriptor msExchPoliciesExcluded msExchPoliciesIncluded msExchRecipLimit msExchResourceGUID protocolSettings proxyAddresses (Proxy Addresses) publicDelegates securityProtocol showInAddressBook submissionContLength targetAddress textEncodedORAddress unauthOrig

You might try installing a copy of the Exchange 2003 Management Tools to clear the Exchange attributes for these users if you think it might be easier. -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "AndyD_" wrote in message news:64255a21-5551-42ed-8c4f-333049259488... Here are the attributes you would need to clear/set to null on a user account. http://msexchangeteam.com/archive/2006/10/13/429192.aspx Remove Exchange Attributes vs. Delete Mailbox Remove Exchange Attributes removes the following attributes as long as they actually exist as available attributes of that schema object: adminDisplayName altRecipient authOrig autoReplyMessage (ILS Settings) deletedItemFlags delivContLength deliverAndRedirect displayNamePrintable dLMemDefault dLMemRejectPerms dLMemSubmitPerms extensionAttribute1 extensionAttribute10 extensionAttribute11 extensionAttribute12 extensionAttribute13 extensionAttribute14 extensionAttribute15 extensionAttribute2 extensionAttribute3 extensionAttribute4 extensionAttribute5 extensionAttribute6 extensionAttribute7 extensionAttribute8 extensionAttribute9 folderPathname (Outlook Web Access Server) garbageCollPeriod homeMDB (Exchange Mailbox Store) homeMTA internetEncoding legacyExchangeDN mail (E-Mail Address) mailNickname (Alias) mAPIRecipient mDBOverHardQuotaLimit mDBOverQuotaLimit mDBStorageQuota mDBUseDefaults msExchADCGlobalNames msExchControllingZone msExchExpansionServerName msExchFBURL msExchHideFromAddressLists msExchHomeServerName (Exchange Home Server) msExchMailboxGuid msExchMailboxSecurityDescriptor msExchPoliciesExcluded msExchPoliciesIncluded msExchRecipLimit msExchResourceGUID protocolSettings proxyAddresses (Proxy Addresses) publicDelegates securityProtocol showInAddressBook submissionContLength targetAddress textEncodedORAddress unauthOrig Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."