I havent heard of any issues but make sure you go to 15.2.1 not 15.2.0 as you will need to change all user passwords if you use 15.2.0.
I would still raise a ticket with support before you upgrade from 14, just to check there is no specific upgrade path. You could also try it on a test server with a trial before you do it on your production server.
Any chance you have a copy of version 14 File Server only?
We're running an older version (12) and are licensed for 14.
I raised a support case late last year as part of a migration process and was told they didnt have a copy of ver 14 for me?
SolarWinds solutions are rooted in our deep connection to our user base in the THWACK® online community. More than 150,000 members are here to solve problems, share technology and best practices, and directly contribute to our product development process.