You're welcome. Post back if you need more help. Here's my stub code.
use tempdb;
GO
DECLARE @TestString VARCHAR(250) = 'C1 User Unable to Log in C2 User did not set password Correctly C3 Assisted User with correct password set up';
SELECT CHARINDEX('C1',@TestString,1)
, CHARINDEX('C2',@TestString,1)
, CHARINDEX('C3', @TestString,1);
returns 1, 26, 65
So you add 2 or 3 to the position and take everything up to that (26) minus 1 and then TRIM it. etc