In the SAP Business One log on window, choose Change Company. Or from the SAP Business One Main Menu, choose: Administration > Choose Company.
1) In the License Server Selection window, specify the license server’s IP address.
2) In the Choose Company window, choose you database from the Current Server drop down list.
Note: Make sure that you can see all the companies on your database.
3) From the Companies on Current Server table, select the company you want to work with.
4) In the Choose Company window, specify your user code and password. Choose OK.
Once your are logged on to a company, the company name and user name are displayed at the top of the SAP Business One Main Menu. The current posting period date appears in square brackets next to the user name, for example: Sales Manager [March 2007]