- Unable to rename subscription example2.com to example.com:
PLESK_ERROR: Error: Unable to create a user for the mailbox. The user with the username email@example.com already exists and has another mailbox.
- example2.com has a mailbox firstname.lastname@example.org: Domains > example2.com > Email Addresses.
- There is a customer John Doe that is an owner of example2.com and its username is email@example.com: Plesk > Customers > John Doe > Change Login Info
Conflict between customer's username and mailbox on example2.com because firstname.lastname@example.org will be renamed to email@example.com
- Login to Plesk.
- Rename username of John Doe customer to something else: Plesk > Customers > John Doe > Change Login Info.
Rename firstname.lastname@example.org mailbox to another one, for example email@example.com: Domains > example2.com > Email Addresses > firstname.lastname@example.org.