Forum Discussion
Outlook Insider not starting
David Overton It's a bug in this "Experiments" section, some of which have been known to cause problems before and which you can delete. Note that it comes back upon restarting Outlook the first or second time, so you'll need to do this again until it's fixed in an upcoming build. You may see one or two things go away when doing this, like the "Coming Soon" toggle as well as the new-style left-side navigator, but who cares.
HKCU\Software\Microsoft\Office\16.0\Common\ExperimentConfigs
16.0.15330.20004 is now out, but it takes a while for "Experiments" to return so I don't know if it's fixed or not. Someone who never deleted Experiments would know.
Update: Looks like the problem is still there. Upon further testing, at least here it relates specifically to 1.28 here:
HKCU\Software\Microsoft\Office\16.0\Common\ExperimentConfigs\Ecs\outlook\ConfigContextDataI would suggest just deleting 1.28, if you have it.
David Overton xyzxyzxyz With a workaround as a stopgap (see above), I'm starting to wonder why I see this problem with some and not others when everyone is using an Exchange account.
Do you have any ideas? Could the version of Windows be involved? What are you running? It does happen that the one having the issue is on Win11 Dev (25xxx) while the one who doesn't is on Win11 22H2 (22621), but I find it hard to believe that's it.
It might also be something about the Exchange account, as there are countless variables there, but we've tried multiple ones (in different profiles) and that so far hasn't been the answer. It remains consistent one way or the other: always a problem or never one.
rpodric It is definitely more complex.
I created another user on my system and could not repro the issues once I joined all the accounts. This suggests it is a profile specific issue as the other user had access to the same accounts, but e-mail worked fine.
What I can say is that I've done a clean install of the latest Windows 11 Dev build and the issue has gone away. I can say I was able to stop the problem for a while by removing accounts from "Settings / Accounts / E-mail & Accounts", so it sounds linked, but in the end, a clean install solved my problem. Same OS, same Exchange, same accounts, same Office - different result.
