Deployment Protection Exception

From your Vercel dashboard:

1. Select the project that you wish to enable Password Protection for
2. Go to the Settings tab, and then to Deployment Protection

From the Deployment Protection Exceptions section, select Add Domain:

From the Unprotect Domain modal:

1. Enter the domain that you wish to unprotect in the input
2. Select Continue

From the Unprotect Domain modal:

1. Confirm the domain by entering it again in the first input
2. Enter unprotect my domain in the second input
3. Select Confirm

All your existing and future deployments for that domain will be unprotected.

From your Vercel dashboard:

1. Select the project that you wish to enable Password Protection for
2. Go to the Settings tab, and then to Deployment Protection

From the Deployment Protection Exceptions section:

1. From the domain row in the Unprotected Domains table
2. Select the dot menu at the end of the row
3. From the context menu, select Remove

From the Reprotect Domain modal:

1. In the modal, type the domain in the first input
2. Type reprotect my domain in the second input
3. Select Confirm

All your existing and future deployments for that domain will be protected.