When using the search exporter to save messages to a PST file it will export and complete however it report that all messages have errors and the Default.PST will remain at its default size.
When searching the Search Export Logs, you will see the error: Object reference not set to an instance of an object, followed by: Failed to store message.
Or
There is a GPO in the environment that will not allow the creation of PST files. This GPO will not only add the DisablePST registry entry but it will also add the PSTdisableGrow (dword) registry entry.
As a temporary solution, search the registry for all PSTdisableGrow and DisablePST entries and set them all to 0. However, next time the GPO is applied at logon the issue will return. In which case the GPO must be disabled.
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