- Locate and open the timesrvr.txt file. The timesrvr.txt file contains the available time servers to use when creating a time stamp for a digital signature.  
- In the timesrvr.txt file, add the time service you want to use. Use the following format:  Description (server_name)  For example:   National Institute of Standards and Technology (time.nist.gov)  
- Save the file. 
Note: To use a file other than timesrvr.txt, change the setting of the ADSKSIGTIMESRVR environment variable (not a system variable).