userPrincipalName ERROR character

[bprfm]

Category

• [] Bug

Version

Please specify what version of IdFix you are using: [ 2.6.0.2 ]
Extra version info in case it's relevant:
Windows Server 2019 (Version 1809, OS build 17763.3165)
Domain started life as a Windows Server 2008 R2, functional domain level is Windows Server 2016.
ActiveDirectory domain is mydomain.ro (mydomain being replacement for a 4 letter domain name we do own, all letters, no dashes hyphens, numbers, etc)

Expected / Desired Behavior / Question

Username doesn't contain any unknown characters, all are [email protected]
No spaces, commas, numbers, single quotes, double quotes, special chars except for the single @ and the . before ro no spaces or tab chars or anything before or after.
VALUE: [email protected]

Observed Behavior

ERROR: Character
ACTION: FAIL

Steps to Reproduce

Click Query
COMMONNAME: John Smith
OBJECTCLASS: user
ATTRIBUTE: userPrincipalName
ERROR: Character
VALUE: John [email protected]
UPDATE: [email protected]
ACTION: EDIT
Click Apply