Hello. Our portal only users are unable to see and choose people in user-picker fields whether custom field or form field. I have granted browse permission to the portal users group but it has made no difference.
We use JSM internally and all users are automatically provisioned from Azure AD. As such they have Atlassian Access accounts but only our support team have JSM product access. These agents are able to see and select users in user-picker fields.
I'm suspecting that this is by design but have not been able to find anything that explicitly states this. Therefore the reason for this question. Please let me know if it should be possible and I will keep looking.
I have also raised a support request.