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DLO 7.5 SP1 on Windows 8.1

Level 2

We are just starting to roll out DLO.

I am running Symantec DL0 7.5 SP1 on Server 2008 R2. Running all the latest Windows and Symantec updates.

We have had no issues with Windows 7, but Windows 8.1 seems to be problematic.

We have one user on Windows 8.1 with Outlook 2013, they have 1 PST file 30Gb in size, and DLO is successful.

We have another user with Windows 8.1 and Outlook 2013 and keep on receiving the following error

"PST is in use by another application. It will retired"

This user has 50 PST files in one location that are 25GB in total size.

DLO is failing to make the local and network backup of these PST files.


I have contacted Symantec support and got told Windows 8.1 is not supported by DLO 7.5 sp1.

When I asked why does one client work the response I got was "Its Luck!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

I got told Windows 8.1 would be supported by an update but they are unable to say when its due.

The support experince was very poor and on a number of oocassion Symantec didn't call at the time requested.


Is this a common problem with Windows 8.1?

Does anyone know when the update is due?

Does anyone know a resolution to this as downgrading the OS is not an option.






Level 6
Employee Accredited Certified

Would you pls PM me the case number. Win 8.1 is supported using SDLO 7.5 SP1

W.r.t the issue, do ensure VSS enabled backups of .pst files is enabled in the profile settings and not MAPI-based backup.

Level 2


Thanks for the reply,

My case number is 06500129

I have VSS enabled

I look forward to hearing from you

Kind regards


Level 6
Employee Accredited Certified

Thanks for the case #. You should be expecting a callback soon from a tech to continue troubleshooting this issue.