You must have the Crowd Administrator rights to be able to carry out the instructions on this page. You can learn more about this here.
Please take a look at Supported Platforms section as well.
How to install 2FA for Crowd: U2F & TOTP?
Step 1. Go to the Crowd Administration tab and select Find new apps section.
Step 2.Enter “2FA for Crowd: U2F & TOTP”in the search field and find application in the search result.
Step 3. Click Install.
After step 3 follow the standard client installation path and the application will be automatically installed on your Crowd instance.
You can also install 2FA for Crowd: U2F & TOTP directly from Atlassian Marketplace by visiting the application product pagehere.
How to uninstall or disable 2FA for Crowd: U2F & TOTP?
Step 1. Go to the Crowd Administration tab and select Manage apps section.
Step 2. Use the search box or just find 2FA for Crowd: U2F & TOTP in the user-installed apps list and click on the application’s field.