It will be required to obtain a mainland Licence if you wish to have staff working from the mainland office. There is no limitation on the visa eligibility for a mainland entity, An Electronic Quota is issued to every company by the Ministry of Labor(MOL) which shows their visas eligibility and this can be increased by increasing the size of your office space.
Alternatively you may wish to consider renting an office in a Free zone. Free zone companies are limited to a certain number of visas and this normally varies from 1-6 visa packages. If you require more than the allotted allocation, then you may be asked to rent physical space inside that free zone. Office costs in Free zones are generally much higher than mainland locations and there is no Ministry of Labour registration in the Free Zone, so staff with a Free Zone visa cannot strictly work onshore in the UAE without special permission.
Book a call with one of our company formation specialists.