Hi Eva,
Either you use SAP Logon Pad / BIP OLAP Connection - internally it uses BICS layer.
BICS is not a separate connection type
and coming to your question,You can follow any thing
Use SAP logon pad connection and save workbook in BIP - it works
Use BIP OLAP connection and save workbook to BIP - it works
Any way you are saving Document to BIP - so its better to use BIP OLAP connection
@Tammy : anything to add this ?
Thanks & Regards,
Subhash