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Modify an existing Powershell script to fix mail level backup and restore for Exchange 2010 and Exchange 2013 ESPECIALLY LARGE MAIL STORE ( More than 1000 mail boxes, store size close to 1TB). The existing script is unstable above 500 mailboxes.
Script should provide the ability to Backup and Restore from a specified location and should be stable enough to handle Shell timeouts and should write status and errors to a log file.
To test the above solution, we also need a script or a batch file to create 1000+ users in AD and mailboxes in Exchange server.
Tell me how you've done stuff like this before, and I will send the existing script to a few top developers before you quote.