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Error Message: MapiExceptionNotFound: Unable to mount database (hr=0x8004010f, ec=-254678990)<\/div>\n<\/td>\n<\/tr>\n- \n
- The root cause behind this error is the failure of mailbox database mounting during the attempt to replicate the content in public folders.<\/li>\n
- Basically this error is encountered in the Exchange management console when you try to create new mailbox DB in an environment with multiple domains and then try to mount the database.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n
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- If the migration operation fails, you can fix the problem by changing a few settings in the Exchange Management Shell as described in the below cmdlet – Set \u2013ADServerSettings \u2013PreferredServer<\/li>\n
- This command sets the preferred AD server in the Exchange Management Shell<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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\n Error: Connectivity Issues<\/strong><\/th>\n<\/tr>\n \n Sometimes administrators will encounter network errors that interrupt the mailbox movement from one version to another even after you\u2019ve completed the installation. In such a scenario, you must check whether your mailbox DB is mounted or not.<\/p>\n Error Message: MapiExceptionNetworkError: Unable to make admin interface connection to server.<\/div>\n<\/td>\n<\/tr>\n\n What might be causing this Error?<\/th>\n Quick Workaround<\/th>\n<\/tr>\n \n \n \n- \n
- This error occurs when there are connectivity issues with the server, the Exchange is working properly but the server fails to send\/receive messages.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n
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- This problem can be fixed by restarting the System Attendant Service. Once this is done, the system is rebooted and the DB is mounted, you will get rid of this issue.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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\n Error: Failed Mailbox Move Requests<\/strong><\/th>\n<\/tr>\n \n When the mailbox move request cannot be completed the migration may well fail. You might encounter errors during the attempt to serve a local move request while transitioning a user from one mailbox DB to another mailbox database. Subsequently the new user fails to communicate with the mailbox DB and is unable to send\/receive emails since there is no access to \u201cOutlook Web Access\u201d due to failed login.<\/p>\n Error Messages:
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- MapiExceptionLogonFailed: Unable to make connection to the server.<\/li>\n
- MapiExceptionLogonFailed: Unable to open message store.<\/li>\n<\/ol>\n<\/div>\n<\/td>\n<\/tr>\n
\n What might be causing this Error?<\/th>\n Quick Workaround<\/th>\n<\/tr>\n \n \n \n- \n
- Error (1) occurs when the local move request operation performed from Exchange Server 2010 fails due to the database being offline.<\/li>\n
- Error (2) occurs when the user fails to connect with the new mailbox database and hence cannot access mailboxes. This can happen due to the mailboxes are in the process of being transitioned, issues with mailbox replication service, proper admin rights and permissions are not granted to users etc.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n
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- Grant \u201cfull access permission\u201d to the mailbox DB on relevant server to the Exchange Servers group by navigating to \u201cExchange System Manager, initiating a right click on the \u201cStorage Group\/Mailbox store and select the \u201cSecurity\u201d option from the dropdown menu. If you don\u2019t see the Exchange Servers group on the window, you can add one here and then grant it the full permission access to resolve the issue.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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\n Error: Mailbox Corruption Error<\/th>\n<\/tr>\n \n While performing a mailbox migration between two data stores or Exchange servers, a particular mailbox may exceed the maximum limit of the number of corrupted mailboxes that was assigned for a specific move request. As a result, the system returns a mailbox corruption error message.<\/p>\n Error Message: This mailbox exceeded the maximum number of corrupted items that were specified for this move request.<\/div>\n<\/td>\n<\/tr>\n\n What might be causing this Error?<\/th>\n Quick Workaround<\/th>\n<\/tr>\n \n \n \n- \n
- Error occurs when the local move request operation performed from Exchange Server 2010 fails with database being offline.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n
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- The above mentioned problem of mailbox corruption can be resolved by changing some settings in the Exchange filters. To get around this you need to increase the limit of the number of corrupt emails that can be transitioned to the data stores by resetting the values in the Exchange filters. This limit can be reset in two ways \u2013 the first is with the usage of PowerShell wherein you can fix the problem by running the command described below \u2013
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\nNew-MoveRequest \u2013identity username \u2013TargetDatabase \u201cdatabase name\u201d -MRSServer CASServer -BadItemLimit XXX<\/code><\/p>\nIn the above code, XXX represents the email count one needs to change. You can easily specify the limit of the number of emails to be migrated by incrementing this count according to your requirements. Also, in the field \u201cdatabase name<\/em>\u201d, you can specify the name of the particular database that possesses corrupt items.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Conclusion<\/h4>\n
While its common to experience mailbox migration errors half the battle is understanding what they actually mean. These steps should help you with workarounds however if the issue persists you may find it easier (and in the long run cheaper) to opt for a third party tool such as \u201cExchange Migration<\/a>\u201d. Exchange Migrator performs pre-migration analysis and offer detailed migration reports so you can identify such issues before you even start the migration. From Office 365 migration to Exchange migration and public folder migration to cross forest migration, it covers it all. It also provides advanced filtering, two-way synchronization, better co-existence features and the ability to schedule migration jobs as per the convenience of the IT administrator.
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- The above mentioned problem of mailbox corruption can be resolved by changing some settings in the Exchange filters. To get around this you need to increase the limit of the number of corrupt emails that can be transitioned to the data stores by resetting the values in the Exchange filters. This limit can be reset in two ways \u2013 the first is with the usage of PowerShell wherein you can fix the problem by running the command described below \u2013
- Error occurs when the local move request operation performed from Exchange Server 2010 fails with database being offline.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n
- Grant \u201cfull access permission\u201d to the mailbox DB on relevant server to the Exchange Servers group by navigating to \u201cExchange System Manager, initiating a right click on the \u201cStorage Group\/Mailbox store and select the \u201cSecurity\u201d option from the dropdown menu. If you don\u2019t see the Exchange Servers group on the window, you can add one here and then grant it the full permission access to resolve the issue.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
- This problem can be fixed by restarting the System Attendant Service. Once this is done, the system is rebooted and the DB is mounted, you will get rid of this issue.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
- This error occurs when there are connectivity issues with the server, the Exchange is working properly but the server fails to send\/receive messages.<\/li>\n<\/ul>\n<\/div>\n<\/td>\n