extract text from osuser()

[Krish2459_58]

Hi - I need to extarct the user name from osuser() as per below output.

OSUser( )

UserDirectory=; UserId=abcdefgh@gmail.com

required output in upper case: ABCDEFGH

[robert_mika · Accepted solution]

upper(SubField(SubField(OSUser(), ';', 2), '=', 2))