Mailbox size displayed as ‘Unavailable’ for all users.

Matthew Flatt

When opening the ESA Admin Console and expanding the list of users you may see ‘Unavailable’ displayed for the Exchange mailbox size.

If you installed the Microsoft Exchange Server MAPI Client and Collaboration Data Objects 1.2.1 component onto your machine(s) running the Archive Service and User Archive Access Service you may see the following message logged into 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 occurs, please reboot the machine(s) as 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 Client and Collaboration Data Objects 1.2.1 component installed onto the machine running the Archive Service and User Archive Access 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/1.0?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.

1. Install Outlook 2007 onto the machine(s) running the Archive and User Archive Access services. This then installs an updated MAPI version which does not require public folders.

2. Install public folder databases into your Exchange 2007 servers.