Timeout while uploading a PST file to Azure for Office 365

"Could Not Finish the Operation Within Specified Timeout"

Don't despair. Use the /NC:2 switch on azcopy.exe. That limits the number of concurrent operations to 2 - which seems to be the magic number to prevent the timeout error. We were able to upload 5 PST files totalling 5GB once we added /NC:2 to the azcopy.exe command.

See https://docs.microsoft.com/en-us/azure/storage/storage-use-azcopy for the specs.