Here, we will talk about another error code Microsoft Office 365 error code 80090016.
The following is a related forum.
We list the possible reasons for the Microsoft Office error code 80090016.

After analyzing the reasons, lets see the solutions for the Microsoft Office 365 error code 80090016.
Here is how to do that:
1.
Press theWindows+Ikeys together to openSettings.

2.Go to Account > Access work or school.
Disconnect all your accounts from here.
Fix 2: Set up Multifactor Authentication for Your Account
1.

Sign in to Microsoft 365 with your work or school account.
After you chooseSign in, youll be prompted for more information.
The default authentication method is to use the free Microsoft Authenticator app.
If you have it installed on your mobile unit, selectNextand follow the prompts to add this account.
If you dont have it installed, there is a link provided to download it.
it’s possible for you to also have a try.
Heres how to do it:
2.
Navigate toUpdate & Security>Windows Security.
Under theProtection areassection, clickDevice security.
Then clickSecurity processor details.
Next, clickSecurity processor troubleshooting.
Copy and paste the path below into theAddress Bar:
C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\NGC
3.
Delete all contents of the displayed folder.
Sign in to your PC with another administrator account.
Open theRundialogue box by pressing theWindows+Rat the same time.
- jot down the command below and pressEnter:
C:\Users%username%\AppData\Local\Packages
4.
Scroll to find theMicrosoft.AAD.BrokerPlugin_cw5n1h2txyewyfolder.
Copy and paste it to the Home Screen.
This is for backup.
Go back to the Packages folder and rename theMicrosoft.AAD.BrokerPlugin_cw5n1h2txyewyfolder toMicrosoft.AAD.BrokerPlugin_cw5n1h2txyewy.old.
Go back to the affected user account and relaunch Outlook.
TypeControl Panelin the Search box and pressEnter.
Go toPrograms > Uninstall a program.
Find the app you encounter the error, then right-click it to chooseUninstall.
Reboot your system and reinstall the app.
Final Words
This article introduces how to fix Microsoft Office 365 error code 80090016.
If you are bothered by this error, go to follow these methods to get rid of the trouble.
Besides, you’re able to back up your important data regularly.