Sage 500 ERP May 2018 product updates for v2017 and v2016 are released
The download links for client, server, client source, server source are available in the Sage Knowledgebase.
The Release Notes are contained in each download link. As a reminder, the download portal includes links to all the downloads. It is the one-stop shop for all supported versions/updates.
After selecting the Sage 500 ERP product, click on My Downloads, and scroll down to 'Downloads and Updates'. From here, select the desired link from the Latest Updates listing.

Or

Please log in and use the knowledgebase article ID to find the appropriate download:

For v2017:
'Download Sage 500 ERP 2017 May 2018 Client Source Update' ID# 91052
'Download Sage 500 ERP 2017 May 2018 Client Update' ID# 91053
'Download Sage 500 ERP 2017 May 2018 Release Notes' ID# 91057
'Download Sage 500 ERP 2017 May 2018 Server Source Update' ID# 91054
'Download Sage 500 ERP 2017 May 2018 Server Update' ID# 91056

For v2016:
'Download Sage 500 ERP 2016 May 2018 Client Source Update' ID# 91061
'Download Sage 500 ERP 2016 May 2018 Client Update ' ID# 91063
'Download Sage 500 ERP 2016 May 2018 Release Notes' ID# 91064
'Download Sage 500 ERP 2016 May 2018 Server Source Update' ID# 91065
'Download Sage 500 ERP 2016 May 2018 Server Update' ID# 91066