Managing personal Outlook.com account settings, security, and privacy
@Kingtallzilla said
Is this a known issue where the Microsoft account alias page can fail to visually update even though the primary-alias change has actually been processed?
Yes. I've seen this behavior on multiple occasions over the last month when making changes to my personal outlook.com accounts.
Is there any way to determine whether a “Make primary” request has successfully processed before clicking anything else?
For me, refreshing the page, or opening a new Private/Incognito browser session to https://account.live.com/names/manage will show the updated state.
Why does a change count toward the primary-alias change limit if the website does not show that the change was successful
Because the change was made on the backend. You just can't see it.
Is there anything that can be done to reset the cooldown when the additional change was caused by the website appearing not to respond?
No. Just FYI.
Limits on Primary Alias Change
Microsoft accounts limit primary alias changes to twice per week and 10 times per year to prevent security abuse. If you recently added a new alias, you may also face a mandatory 48-hour to 7-day cooldown before you can set it as your primary sign-in
Limits on Alias Creation
Microsoft limits personal account alias creation to prevent abuse. You can only create up to 2 new aliases every 7 days. Additionally, you are restricted to a rolling annual maximum of 10 new aliases and a total of 10 active aliases on your account at any given time.