Once the preliminary details of your future business are ironed out and your funding and initial investment capital is in order, you can begin the formal process of obtaining a trade licence through the Department of Economic Development. Regardless of what business structure you have decided on, if you are an expatriate you likely need to appoint a local service agent, also known as a sponsor.
Since non-GCC nationals are not permitted to be majority share holders outside of free zones in the UAE, a system of shared ownership has been developed in which UAE nationals formally own 51% of the company and the foreign proprietor owns the remaining 49%; details of profit and loss distribution are then agreed upon in a separate contract. Local sponsors can be individuals or locally-owned businesses. For the most part, a local sponsor will not have any responsibility towards the business but is obliged to assist with all government related procedures such as obtaining permits, trade licences, visas and labour cards. His/her signature will be required on most official forms.
Also keep in mind that certain businesses require separate approvals from varying government ministries before the trade application can be completed. When applying for a trade name, be sure to enquire about any external approvals that will be needed for the proposed business activity. Do note that 'Virtual offices' are not allowed by DED which has advised potential investors that any commercial enterprise in Dubai must have a physical address and an actual office.