On partnersource it is quite simple to search available hotfixes (if you know how!).
1. Visit https://mbs.microsoft.com/knowledgebase/search.aspx (PartnerSource login credentials are required)
2. Choose product "Navision"
3. Search for "kbqfe"
3. Choose a module or search them all
Limitations are 100 articles per search but to get the latest ones you can search on modified within.
If you are looking for NAV platform updates or platform hotfixes you can benefit from this site if you already know the knowledgebase article number: https://support.microsoft.com/contactus2/emailcontact.aspx?scid=sw;en;1410&WS=hotfix