We have the exact same, frustrating problem, but not "every" time. For example, it was 3-5 minutes early this week, and GetPortalsLivingAtlasCategories was the culprit, but today it's 1-ish minutes to open, with random "instant opens". #02279274 When executing "Activate Catalog View" in Task Assistant, Pro 2.3 locks up. Closed with "Issue was network related.", which is incorrect, but with non reproducible cases like that, there's usually no path to a successful resolution. The analyst identified GetPortalsLivingAtlasCategories as where the hang was occurring. The fact that multiple orgs are now experiencing this lend more support to it NOT being network related. I'm going to stand up a Pro install on an Amazon instance (which I've recently discovered is a great way for myself and the analyst to both be testing in the same environment: I can grant them access) and will contemplate re-opening this case while I spend an entire 3-day weekend fixing plumbing. How frustrated I get with soldering pipes and losing PEX compression rings will indicate my willingness to roll up my sleeves with TS on a non-reproable issue. I am philosophically opposed to calling TS with cases they can't repro, and I've had a recent string of those, and a few that were in near-non-repro territory for a long while, wasting the analyst time. Gregg Roemhildt if you want to open a new case, which might be a good idea since you might have a slightly different environment, reference 02279274 and ask for "Danny R". Keep us posted! If you do open a case, one thing I suggest you do that we didn't do is do a Wireshark trace (not Fiddler, important distinction), and bring in a network analyst (your end) to definitively rule out "Network Related". ESRI may also have a "test" portal that you can connect to and they can run wireshark on their end, maybe? I have done that on cases past, but as of now, I don't have a WAN engineer handy. Another note in my case the problem was specifically related to using Task Assistant Manger, where I could repro it every time, and not on start up, where I can't consistently repro it. A few more details would help to. I've seen "unable to even use Pro" when users with Roaming Profiles (where their My Docs is on a network share) and the Pro default stuff is going on the share, as well as the number of PTL/AGOL groups a user is a member having an impact on start up time.
I too wonder why GetPortalsLivingAtlasCategories is "needed". Perhaps if it's "desired" some checkbox can turn it on, but for the rest of us whom need to get work done, and not stare at spinning blue circles all day, leave it off.
That could get out of hand.