How to resolve an internal server error in CodeTwo Backup and CodeTwo Office 365 Migration
You are unable to restore or migrate data to the selected Microsoft 365 (Office 365) mailbox. You get the following error:
An internal server error occurred. The operation failed.
Unable to upload item - [Item ID]. Error: An internal server error occurred. The operation failed.
This error may occur if the mailbox to which you are restoring your backed-up data or migrating data runs out of space. To be able to run the restore or migration job, you can: