Today, Microsoft released an update for its Authenticator app for beta testers on iOS. The new version is 5.3.2, and it comes only about 16 hours after 5.3.0 was released.
The big changes in version 5.3 are that the app now supports icons and profile pictures, which should help you to better organize and identify your various accounts. It also improves "interactions with VoiceOver and keyboard."
5.3.2, as the version number indicates, fixes some bugs that were included in last night's update. The company says that it "fixed a bug in Adal for one drive [sic] users", ADAL of course being the Azure Active Directory Authentication Libraries.
These are the first real new features that were added since version 5.1 was offered to beta testers back in February, adding the ability to edit accounts. It's not available for the Android app just yet, even in beta, but it shouldn't be too long before it is.
If you want to get involved with the closed beta for Microsoft Authenticator on iOS, you can do so by sending an email to firstname.lastname@example.org with your name and Apple ID.