Add an authentication screen to  the workflow client from which you can authenticate with a  generated  X.509 certificate  instead of a user name and password combination. 
- Copy the X.509 certificate used for  authentication into  a directory on the same host as Unwired Server. For example, c:\certs.
- Create a registry string value on Unwired Server at HKLM\Software\Sybase\Sybase Messaging Server\CertificateLocation and populate it with the path. For example, c:\certs.
- Name the X.509 certificate file as domain_user.p12, where domain is the Unwired Server domain and user is the certificate user.
The user must have read permission for .p12 file.
-  The system administrator must  ensure the specified domain\user has “log on as batch job” permission on the Windows machine on which Unwired Server runs:- Double-click  .
- Expand Local Policies  and select User Rights Assignment.
- Right-click Log on as a batch job and select Properties. 
- Select Add User or Group and add the domain\user.
 
- The account under which Unwired Server runs must have adequate permissions to impersonate the domain\user, for example, the Administrator account for the domain.