Last December, Microsoft announced updates to its Microsoft Authenticator app
If you haven’t heard of this app before, it is the default two-factor authentication that should be for any Office 365 tenants 2fa prompts due to Sim Hijacking.
The App update included the ability to store Website Passwords using Autofill , however as its in preview only if you have a Personal Microsoft Account registered to the device. Microsoft has not made this available to 365 users as of yet , probably because its in preview , until they iron out the bugs! They are allowing some organizations to be on this beta list. Click here to try yourself
When you visit a site or app for which you have saved a password, Authenticator offers to autofill it.