- 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).