There are several ways, you can give access to the Accorto TIme+Expense application to users:

In general, it is suggested to create custom profiles to manage access.

Global (Profile) Access

When installing, select the "Install for All Users" option:

This updates all your custom profiles.  

You could also select Specific Profiles. 

In both cases, users only are able to see the application, if they are assigned a license.

> Setup > Installed Packages -- Manage Licenses link for Accorto T&E Plus

Permission Sets

Accorto provides also Permission Sets

> Setup > Permission Sets

  • Accorto T+E Administrator
  • Accorto T+E User

You can assign Permission Sets also from the Users page.

If users experience access issues, you could fix this in the Profile, or assign a Permission Set.