To successfully migrate data from your organization's Google Drive, you need to have your administrator add ShareGate Migrate to the Google Workspace allowlist.
Note: ShareGate Migrate only supports migrations from drives that are part of a Google Workspace organization.
How-To
Access your Google Admin console.
Select Security in the sidebar.
Expand Access and data control.
Select API controls.
Verify that Trust internal, domain-owned apps is checked.
Click on MANAGE THIRD-PARTY APP ACCESS.
Select Add app from the top menu.
Select OAuth App Name Or Client ID from the dropdown.
Copy-paste the line below in the Search for OAuth app name or client id field.
863730239928-vtuvc0acvjg4va13mu8svrns63n2k148.apps.googleusercontent.com
Click Search.
Select ShareGate Migrate (it should be the only result).
Select 863730239928-vtuvc0acvjg4va13mu8svrns63n2k148.apps.googleusercontent.com in the Configure an app screen.
Click Select.
Select Trusted: Can access all Google services for the App access.
Click Configure.
ShareGate Migrate should now figure in your Configured apps list.
Click on API Controls in the breadcrumb menu at the top.
Click on MANAGE DOMAIN WIDE DELEGATION in the bottom of the page.
Select Add new from the top menu.
Copy and paste the Client ID and OAuth scopes below.
Client ID863730239928-qlbiuhv19ak18hi56mk2mp61ca9s5co3.apps.googleusercontent.com
OAuth scopes
https://www.googleapis.com/auth/drivehttps://www.googleapis.com/auth/admin.directory.user.readonlyhttps://www.googleapis.com/auth/admin.directory.group.readonlyhttps://www.googleapis.com/auth/admin.directory.domain.readonly
Click AUTHORIZE.
You are now set up for your Google Drive migration.
Note: If you experience any issues, see Google's article, Allow third-party apps for Drive files.