Mailbox size displayed as 'Unavailable' for all users

Category: Troubleshooting & error messages
Date: November 2009
Product: Exchange Server Archiver

If you are using Exchange 2007, when you use Exchange Server Archiver to run an archive or when the Admin Console retrieves mailboxes sizes you may see 'Unavailable' displayed for the Exchange mailbox size.

If you installed the Microsoft Exchange Server MAPI Client and Collaboration Data Objects (CDO) 1.2.1 component onto your computers running the Archive Service and User Archive Access (UAA) Service, you may see the following message in the Admin Console:

ArchiveService

COMException logging on to Exchange Server: System.Runtime.InteropServices.COMException (0x8004010F): Error in IMsgServiceAdmin::CreateMsgService: MAPI_E_NOT_FOUND

Error: This information service is not installed on your computer. To install it, use the Mail And Fax icon in the Control Panel.

If this message is displayed, reboot the computers; even though the MAPI CDO installation does not prompt you, it is often required.

On a solely Exchange 2007/Outlook 2007 environment with the Microsoft Exchange Server MAPI CDO 1.2.1 component installed on the computers running the Archive Service and UAA Service, you may also see the following message:

MAILBOX

Cannot open mailbox 'user@domain.com'.

Ensure that:
- the Archive Service is running as a domain user with the required permissions (for more details, see http://www.red-gate.com/ESA/1.1?i=9420 )
- the Microsoft Exchange Information Store service on mailboxserver.domain.com is running

This message can occur because the MAPI CDO download communicates with Outlook 2003 MAPI, which requires public folders.

There are two possible ways to work around this problem.

Install Outlook 2007 onto the computers running the Archive Service and the UAA Service; this installs an updated MAPI version which does not require public folders.
Install public folder databases into your Exchange 2007 servers.

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