I’ve been having lots of fun with multiple Sitecore Commerce projects and Azure SQL lately . . . here’s one quick note I can share that might save some hassle for others working in this space . . .
This Sitecore link mentions a DCOM permission to verify in the course of troubleshooting some Sitecore Commerce “Staging” issues. My problem was that this guid, 7E95698D-CD3C-4C98-93C7-6510C31F7DDF, wasn’t visible in the Component Services treeview under “DCOM Config.”
Sitecore support informed me that they needed to update their documentation to mention that in the absence of that Guid, one should locate the “CSS Replication Server” object in the treeview and proceed from there.
My screen shot shows where the illusive Guid is stored as a property of the CSS Replication Server entry: 
I expect Sitecore will update their documentation shortly, so this blog post may have a brief shelf-life in terms of relevancy . . . but if you’re like me and the Commerce platform, any notes are appreciated, so I’ll see if this helps anyone in the community.
Sitecore Architecture 