eir company. Remote access is crucial. They need to talk with secretaries, experts and SO on within the company. The mobile phone or communicator is their tool. They need to get access to information in company databases inside the firewalls that sort out authorized persons from hackers and other non-authorized persons to get access to sensible information. We should also note that enterprises increasingly strive for a 'slim' organization, hiring experts for time-limited projects. The core competence is, however, kept within the com- pany by permanently employed people. Typically if the permanent employees are counted in hundreds, experts in the enterprise's contact network may be counted in thousands. The experts may work for more than one company in parallel. This poses the question 'Which persons should get access to what information and when?' Security mechanisms and administration of these are vital in order to avoid information leaks. Branch offices Branch offices operate as a local business partner to customers and are also a sensor for what is happening in that market. Effective inter-site networking for communication and access to information is critical. The ideal situation is when a branch office does not see the distance to the head office and other branch offices as a problem. Who owns the office buildings? We should note that enterprises increasingly hire office spaces in large office buildings, maybe sharing a common communication network with other enterprises. Virtual private network (VPN) functions, security mechanisms and administration of these are also vital in order to avoid information leaks. Partners Effective communication with partners is essential. Thus enterprises need call-centres, e-business enabled company web sites or portals for B2B communication, and effective means of bit transport with sufficient bandwidth for external and extranet communications. The partners and their employees normally have access to large parts of an enterprise's intranet, its facilities and information. So