Exchange New-MailboxExportRequest PST backup to Linux server share

Question

I'm putting together a backup script for an MS Exchange server. It uses New-MailboxExportRequest to export the Mailbox as PST files.

However, it doesn't appear possible to write these PSTs to a Linux samba share (i.e a shared folder on a Linux server that's mounted in Windows).

Despite the share even having 777 permissions, New-MailboxExportRequest is unable to write to it. If I write to the folder using any other method from Windows, it's fine.

I understand the target folder needs write access by the "Exchange Trusted Subsystem" user. However, that user isn't available under the share folder permissions from Windows to grant access there (It only allows the linux server location to look for users/groups to add). I've already granted "Full Control" to the "Everyone" user/group and even that doesn't work... For all normal purposes, the folder is writeable.

Is there some way to specify access for "Exchange Trusted Subsystem" to a Linux folder share, or some other option here?

Alternatively, I may need to backup to an NTFS filesystem somewhere in the Windows end, but I'd prefer to use the Linux server if possible.

Thanks.

Answer 1

It's a group (Exchange Trusted Subsystem) not a user.

If your samba share cannot find/add that AD group to the share and file level permissions there, it isn't going to work.

Alternative would be to export it to a folder on the Exchange server itself and then just move the PST file across the network to the Linux samba share using a logged in user that has permissions to do so.