Does CORE allow me to change a CORE User ID from uppercase to lower case to be in compliance with the User ID Naming Convention outlined in the CORE Access Policy?  

No, CORE does not distinguish between upper and lower case User ID.  The new UDOC would be considered the same CORE user ID in the system. 

Note:  If the user ID is in use by another user insert a number or replace the last character with a number when the character limit has been met.

Example:  A.MACGYVER and a.macgyver are recognized as the same User ID in CORE system. To correct the User ID A.MACGYVER, a new UDOC will need to be created using a.macgyver1 as the User ID .