Where can I find if Liscense/Maintenance codes are expiring in T24.

The SPF file is the place to find such information

Thanks. Got it.

Field 'MAINTENANCE.DATE' of F.SPF record contains expiration date.

Installation Guide TEMENOS User Guide Page 15 of 22
System Parameter File - Licence details
Contract details, including the maintenance date, number of users and products purchased are held on the SYSTEM record on the System Parameter File, SPF. These fields can only be amended through the T24 application SPF. To change any of the fields, a code (MAINTENANCE.CODE, PRODUCT.CODE or USER.CODE) must be entered. This code is issued by TEMENOS.
WARNING: If you attempt to change these fields by any other means (e.g. editor), you may corrupt your database.
License code
The LICENSE.CODE will have been allocated to you when your implementation tape was cut, or, for clients who have had T24 for longer, when you upgraded through release G5. The license code is a 12-digit code, unique to each implementation of T24. If you do not have a code on your SPF, please contact your T24 Support Centre Help Desk.
You should not change this field, unless you are told to do so. To change this field, you must enter a valid MAINTENANCE.CODE, which will be issued by TEMENOS Help Desk.
Maintenance date
To enable TEMENOS to monitor the licensing of T24, licence checking was introduced. For convenience sake, this has been linked to the date on which maintenance fees are due. Once the maintenance fees have been received, a maintenance code is issued automatically by TEMENOS Help Desk. You will be told to enter either a MAINTENANCE.DATE or MAINTENANCE.CODE, or just a MAINTENANCE.CODE which will cycle the MAINTENANCE.DATE automatically.

Check SPF, I SYSTEM ...you will get MAINTENANCE.DATE field
There change the date , and Commit(Cntrl V), Now restart Browser as well as Putty...Now chceck you will get the solution.

Thanks Vinay. As confirmed above I got this resolved about 6 years back :).