The Phone and Office Location (address) that appears on your landing page on moodle.com/services comes from your Details page on the Partner portal.
To update your address or phone number:
Log into the Partner portal with the appropriate role (Principal or Marketing).
Navigate to your details page (Partner Database > Details tab).
Edit the address or Primary Leads contact (Phone) fields. Save your changes.
Your changes will appear in a few hours (the data is synched 2 times per day) on your landing page on moodle.com/services.
Screenshot of details page in Partner portal: