Why am I not able to access another partner account for a user?
As a partner user, you only get access to your own Partner accounts. Hence, you aren't able to access another partner account for a user.
However, it depends on your configuration. Here's how you can check the user specific access:
- Click on the Settings and Actions menu and go to Setup and maintenance.
- Search for the Manage Sales and Services Access task.
The Sales and Service Access Management page appears.
- Click on the Explore Access tab and fill the required fields.
Now you can see the accesses related to the selected object.