At the time of writing I am a user of Sage 50 Accounts (v30) and for purchase invoice items posted within AutoEntry, Sage 50 presents the user with a 📎(paperclip icon) from within the Purchase Ledger>Activity screen to view the associated document in a web browser. However the same functionality is conspicuous by its absence in the Sales Ledgers.
I have confirmed with AutoEntry that the link is generated as part of the posting in Sage, this is further evidenced as the external link is available from within the Transactions window by selecting the icon in the 'View' column.
For the convenience of your AutoEntry users I would implore you to include the same functionality in the Sales Ledgers that is already present in the Purchase Ledgers/ Transactions windows for viewing posted items.