Google to Office 365 migration: planning mail migration

Prerequisites Make sure that you have an administrator account in both environments (Google Apps and Office 365). Make sure that your Office 365 tenant is up and running. Add the domain of your choice to the Office 365 tenant. It can be the same domain as Google. However, in this case, emails will be delivered […]

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The SMTP address has no mailbox associated with it

Problem While migrating a user to Office 365 or Exchange using Cloudiway, you see the following error : “The SMTP address has no mailbox associated with it”. Cause The target is incorrectly configured. If the target is Office 365, either the account does not exist or no Exchange license is assigned to it (in this […]

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Google Error: Request failure: Execution of request failed

Problem While migrating from Google, you see the following error: “Request failure: Execution of request failed”. There are multiple possible causes: Cause 1: account inaccessible The account no longer exists in Google, is disabled, or the user must change password at next logon. Resolution Activate the account or ask the user to login to Google. […]

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Precondition failed.: !string.IsNullOrEmpty(authorization.RefreshToken)

Problem Your’re hitting the following error message in your migration logs at the beginning of a migration: A fatal error occurred in Google Connector for user user@company.com : Precondition failed.: !string.IsNullOrEmpty(authorization.RefreshToken) Cause This is because the Google account does not exist, is disabled or the user password has expired (in this case Oauth does not […]

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The primary SMTP address must be specified

Problem You’re migrating emails to an Exchange server or to Office 365 and the message “Error writing mail (code 3): The primary SMTP address must be specified when referencing a mailbox” is displayed in the migration logs. Cause This error occurs when the target email of the user references an alias instead of the primary […]

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The request failed schema validation

Problem You notice the error “The request failed schema validation” in the user migration logs. Cause Cloudiway hits a bug where it cannot convert data to an Exchange format. Resolution Open a support ticket to get it fixed. Note It has almost no impact on the migration. This error almost never appears. If it happens, it’s […]

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Unexpected execution delay

Problem This message doesn’t mean that an error has occurred. It’s there to inform you that an operation is abnormally long. Cause Some operations during the migration process can be longer than expected. The execution delay may therefore exceed the average delay. Examples include a mailbox folder tree with several hundred items, or when a […]

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Throttling limit reached, stopping migration

Problem You notice the error “Throttling limit reached, stopping migration” in the user migration logs. Cause 1 Google connector: As explained elsewhere, Google has its own throttling limitations which means you can only migrate between 2.5 and 3.5 GB of data within 18-24 hours per user. Cloudiway automatically stops the migration of a user when […]

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ErrorMailboxStoreUnavailable – ErrorTimeoutExpired – ErrorBatchProcessingStopped

Problem You’re getting this error message when the source or target Exchange server (or office 365) is not accessible anymore. Cause The connection to the source or to the target Exchange server may be throttled due to high load on the server. Resolution If the error (ErrorMailboxStoreUnavailable, ErrorTimeoutExpired, ErrorBatchProcessingStop) happens only one time, the item […]

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The method or operation is not implemented

Problem You’re facing this issue when Cloudiway migration tries to process a kind of data that is not implemented by the source or the target connector. Cause Some elements selected in the global settings of your migration are not implemented by the source or target connector. Resolution Uncheck the elements that cannot be migrated in […]

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