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Zoey Carrubba I need help on the module set up and Manage Shield platform Encryption
At the end of the challange I open my trail head to try to encrypt the Account Phone field. But it wont let me encrypt the account phone field. I dont know to encrypt the account phone and save it so i can finish the challenge. 
We have a separate Trailhead team who can help you with these issues.
So, can you please use the below link to reach out to them so that one of the agents will get in touch with you.
Support:https://trailhead.salesforce.com/help Thank you! Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.
Regards,
Salesforce Support.