I make it 180
The site doesn't list the extremely useful portal at https://msportals.io/ which is a bit of an obvious omission for any genuine completist.
A sysadmin supergroup has created a site that tries to list all of the portals Microsoft offers its users. Their tally so far: 179 portals. Law firm operations manager, Register contributor and Microsoft MVP Adam Fowler, who set up and owns the project, described the situation as “a bit of a sprawl issue” for Microsoft. That …