Adding Dropbox

Configure the Single Sign On application.

Log into Passly https://(company name).my.passly.com
Select Directory Manager.
Select Groups.
Select the Blue plus sign in the bottom right corner.
Name the Group Dropbox Users.
Note: If you have other existing Groups for SSO users you can use one of these as well.
Select ADD GROUP.
Select SSO Manager.
Select the Blue plus sign in the bottom right corner.
Select the Catalog Icon.
Select Dropbox from catalog.
Select Application Enabled.
Select the desired Authentication Policy. Use default if you are not certain.
Select Add Application
Select Permissions.
Choose the Group you created in Step 4.
Select Signing and Encryption.
select Copy

Copy the encoded certificate to the same note pad keeping it separate from the thumbprint.

You will need to follow this guide posted by Dropbox https://www.dropbox.com/en/help/1909