Why is a backup or restore of the SQL server database not possible?

Issue:

When doing a backup or restore of the XPhone SQL database UCDATA08 service "SQL (UCS08)" an error message appears, stating that it's not possible because the database is still being accessed, even if the XPhone Server service itself is no longer running.

Solution:

Close the "XPhone UC Server service manager". This tool may access the SQL service as well.