PST Centralization & Collection Issues

Hello All

Just in middle of business day at work so kind off exhausted. We're running effort to centralize PST files in environment into Enterprise vault (9.0.1.1073)

The PST locator task has been running fine - it went out and found over 12TB files so far and still running. We started through pilot phase as well. We're relying on Server driven migration as our primary way of centralization.

The collector task is configured to run in off business hours. We've sent out note to concerned persons to leave their workstations online while this centralization effort completes. However we do not see Collector task copying lot of files. The holding folder has limit of 40GB (whch I increased to 200GB today) and we observed that Migrator task is able to process about 35GB in 2 hours.

The majority of error that I see in collector task log is:

Could not copy PST file: \\Client01\C$\Documents and Settings\dduck\Local Settings\Application Data\Microsoft\Outlook\Archive.pst : Could not access PST to set it to be read-only. Check that the PST Collector task's log on account has write access to the PST. **

Migration Status of PST: \\Client01\C$\Documents and Settings\dduck\Local Settings\Application Data\Microsoft\Outlook\Archive.pst has been reset to: Ready to Copy

The failure text in SQL PST File table says:

Could not copy PST file: \\Client01\C$\Documents and Settings\dduck\Local Settings\Application Data\Microsoft\Outlook\Archive.pst : Could not access PST to set it to be read-only. Check that the PST Collector task's log on account has write access to the PST.
 

The account I am running collector task under is an Domain administrator and we've Domain admins have full admin access to all workstations in environmment.

I am planning to run DTrace through tonight to see if it logs any additional details around it but anyone having ideas on above that could point in right direction?

Do we expect same log lines if workstation is offline? (content of error kind of indicates permission issue but just confirming if same error will come if workstation is offline)

Thanks in advance !