Source: GroupWise Exchange Gateway.
Explanation: The gateway is unable to find the gateway's Message Store in Exchange 5.x/2000.
Possible Cause: The Exchange server services might not be running.
Action: Verify that all Exchange server services are running. See Configuring the Exchange Side of the Exchange Gateway.
Possible Cause: The user logged into Windows with insufficient rights to the Exchange system and the Mailbox store.
Action: Verify that the user logged into Windows has enough rights to the Exchange system and the Mailbox store. See Configuring the Exchange Side of the Exchange Gateway.
For Exchange 5.x, the user logged into Windows should be a member of the Administrators, Domain Admins, and Domain Users groups and should have administrator permissions to the Exchange Organization, Site, and Configuration container property pages of the Exchange Server.
For Exchange 2000, the user logged into Windows should be member of the Administrators, Domain Admins, and Enterprise Admins group and should have enough rights to the Exchange system. See Configuring Exchange 2000.