Hi there,
I think that's what Eswar was talking about. You need to specify an account that will be used by Task Sequence to access Network Share on SCCM Server to read Boot Image, and ultimately write the OS Image you captured also to (other) network location.
If you don't have one, create it, usually named NetworkAccess or similar.
When you create it, set sharing and security permissions (Read is enough) onto this foder \\DEPLOY.BENEDEPLOY.LOCAL\SMSPKGC$\, or any folder where the boot image is contained in. Also, this account should also have necessery permissions for accessing location for writing down Captured Image.
Hope this helps.
Best regards,
Vladimir Jakovljevic