Hey there!
By default, the VCN allows only one user to use the
Admin account to log in to the OMU portal of the server. Modify the system properties as follows:
1. log in to the OMU portal of the server;
2. choose Maintenance > Unified Configuration;
3. Set the Module name to OMU and Parameter type to System property and click Search;
4. Click Edit mapping MaxLoginSession in Parameter Name;
5. Modify the Value as required. The value ranges from 1 to 100.
6. Click
Save. A dialog box like the one shown in Figure 1 is displayed.
Figure 1. System reminder 
7.Click
OK.