Navigate Here: Implementation > Solicitation Management > Browse Solicitations, select a solicitation > Bidders tab, click the Add icon 
You can add a solicitation bidder on Add Bidder page.
To add a bidder, fill in the following fields:
The required fields are noted with an asterisk (*).
Bidder ID*: The identification number of the bidder automatically generated by the system.
Bidder Name*: The name of the bidder.
Status: The status of the bidder. It is Draft by default, and you can select other status from the dropdown list.
Email: The email address of the bidder.
Description: The detail description of the bidder.
Once you've finished adding, click the Save button to save the new bidder, or click Save & Add button to add another.
Click the Cancel button to return to the Bidders tab page without saving.