Are there any switches in Recovery Manager for Exchange PowerShell cmdlet when exporting from Archive Manager to limit size of PSTs and then create further PSTs so that they're more manageable rather than one large PST file?
There is the ability to continue a restore into a new .PST file when the existing file reaches a certain limit when restoring mailboxes or folders to separate .PST files.
There is a number of cmdlet parameters that control this. They are listed in the Management Shell help.
For the Restore-RMEMailbox cmdlet:
-PstSizeLimit
Specifies the maximum storage capacity in megabytes for each Personal Folders (.PST) file being created during the restore operation.
-StopWhenPstFull
Specifies to not restore the remaining data in case the data being restored exceeds the maximum .PST file size. When this parameter is omitted, a new .PST file is created and the remaining data is restored there.