Hi Richard,
Thank you for posting, I am here to help. Since this is an organization device only your IT Administrator can able to help you with this credentials.
If you attempt to perform the factory reset on your Surface Pro it will ask or require you to enter the Bitlocker key which is only the IT Administrator from your organization has it.
We recommend you to reach out with them to assist you regarding the access / credentials.
I hope you find this information helpful. Please let us know if you have any further questions If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher