Hi @Jingyi Xu ,
I checked for outages and there does not appear to be one going on right now.
If you're having trouble launching Microsoft Store, here are some things to try:
Check for connection problems and make sure that you're signed in with a Microsoft account (Outlook, Hotmail, Live, Xbox, etc.). The issue may be related to the account that you're using since you said it's an Azure AD account.
Make sure Windows has the latest update: Select Start , then select Settings > Update & Security > Windows Update > Check for Updates.
Check your time and location settings: Select Start , then select Settings > Time & Language.
Select Date & time to verify your time settings and select Region to check your location. These settings need to show your current location and time zone.
Reset the Microsoft Store cache: Press the Windows Logo Key + R to open the Run dialog box, type wsreset.exe, and then select OK. Note: A blank Command Prompt window will open, and after about ten seconds the window will close and Microsoft Store will open automatically.
Still can't open Microsoft Store? Send us feedback. Select Start , then select Feedback Hub, and then do one of the following on the Home page to provide your feedback:
Select Report a problem and then follow the directions.
Type your problem or suggestion in the Search feedback box at the top, select the search icon, select the Add new feedback button, and then follow the directions. You can also review or upvote existing feedback similar to yours.
https://support.microsoft.com/en-us/help/4027338/microsoft-store-does-not-launch