In GMS 8.2 / Analyzer 8.2,
When trying to change / update the password for a GMS management user from the login screen after the password has expired or by enabling the ‘change password’ option under the Console > Management > Users screen, GMS display the following error "Update failed: Invalid Input" due to the mishandling of non-alphanumeric characters.
The issue has been reported on DTS 181556 and the fix will be included in GMS / Analyzer 8.2 SP1.
Here is a workaround to resolve the issue temporarily until GMS / Analyzer 8.2 SP1 is available.
Note: Do not select "Change Password" box, leave it blank.

**If the default username of "admin" is experiencing this issue, applying Service Pack 1 to GMS/Analyzer 8.2 is required to resolve the problem. The System Interface (/appliance) used to apply such upgrades is not affected by this issue.