Hi again,
After the Windows guys did some magic on the fax server, the faxes are now being sent, but in SCOT they still are under "in transit" section, with status 710. So they are in processing outside of SAP, but no status message has been received back to SAP.
I have discovered also other posts about the blocked "in transit" situation, but so far, none applies.
I will keep investigating, but please, if you have some recommendations, let me know.
Thank you!
Delia