- Sign in to Zoho One, then click Admin Panel icon
on the top-right corner. - Click Organization on the left menu.
- Select Domains, then click Sync Existing Domains.

- Click Continue.
- All
domains associated with your Zoho apps will be listed along with their
authentication status. Select the ones you want to sync to your Zoho One
organization and click Sync.
The selected
domains will now be synced to Zoho One, and you'll be able to manage
these domains centrally from Zoho One's Admin Panel.